JP2018046371A - Ring network system, ring network change method, and ring node device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change a logical ring network shape without causing a logical loop.SOLUTION: A change part changes setting about a corresponding logical communication path in each logical ring network on the basis of first information about a logical communication path being an object for changing setting, second information about a logical ring network to be a transfer source of the logical communication path, third information about the logical ring network to be a transfer destination of the logical communication path, and fourth information about a logical ring network set in an own device. The setting part deletes setting about the logical ring network and the logical communication path in the entire ports with the first logical ring network set on the basis of the first information, the second information, the third information and the fourth information, and adds setting about the logical ring network and the logical communication path in the entire ports with the second ring network set after the deletion of the setting.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a ring network system, a ring network changing method, and a ring node device.

  One method for configuring a relay network used for a wide area Ethernet (registered trademark) service is a ring network including nodes connected in a ring shape. By applying a ring protocol to the ring network, it is possible to construct economically while securing a redundant path (see, for example, Non-Patent Document 1). In a ring network using the ring protocol, it is possible to build a redundant path with node fault tolerance throughout the ring network by connecting each ring network redundantly. If any node in the ring network fails In this case, the route is switched to ensure the normality of communication.

  In addition, there is a method of changing a setting related to a logical communication path belonging to the logical ring network after the logical ring network is constructed (see, for example, Patent Document 1).

Recommendation ITU-T G. 8032 / Y. 1344, “Ethernet Ring Protection Switching (08/2015), 1 Scope, p. 1; 6 Introduction, p. 5

Japanese Patent No. 5771559

  By the way, when a plurality of nodes constituting a logical ring network execute processing for adding settings related to logical communication paths to the logical ring network and processing for deleting settings related to logical communication paths from the logical ring network in an arbitrary order. A logic loop may occur. However, there is no known technique for changing the settings related to the ring network and the logical communication path in all the nodes constituting the ring network. Furthermore, a technique for changing the configuration of the ring network without causing a logic loop is not known.

  The present invention has been made paying attention to the above circumstances, and an object of the present invention is to make it possible to change a logical ring network shape without causing a logical loop in a ring network configured using a ring protocol. To provide a network system, a ring network changing method, and a ring node device.

  In order to achieve the above object, an aspect of the present invention includes the following components. That is, the ring node device forms a logical ring network and applies a ring protocol for setting a logical communication path enabling communication in the logical ring network, and the first logical ring network or the second logical ring network. A ring node device included in at least one of the ring node devices includes a changing unit and a setting unit. The changing unit includes first information relating to a logical communication path whose setting is to be changed, second information relating to a logical ring network serving as a transfer source of the logical communication path, and third information relating to a logical ring network serving as a transfer destination of the logical communication path. Logical communication path corresponding to each logical ring network based on the first information, the second information, the third information, and the fourth information related to the logical ring network set in the own device Change the settings for. The setting unit deletes the settings related to the logical ring network and the logical communication path in all ports where the first logical ring network is set based on the first information, the second information, the third information, and the fourth information. Subsequent to the deletion of this setting, a setting related to the logical ring network and the logical communication path is added to all ports in which the second logical ring network is set.

  The present invention provides a ring network system, a ring network changing method, and a ring node device capable of changing a logical ring network shape without causing a logical loop in a ring network configured using a ring protocol. To do.

The figure which shows an example of the network system provided with two logical ring networks. The figure which shows the two logical ring networks and one logical communication path which were set to the ring network of FIG. The figure which shows an example which adds the setting regarding the logical communication path of FIG. 2 to another logical ring network. The figure which shows an example which added the setting of FIG. 3 to the node. The figure which shows that the logical communication path set to the logical ring network was moved, but the logical loop has generate | occur | produced. The functional block diagram of the ring node apparatus of 1st Embodiment. The functional block diagram of the representative communication apparatus which is a ring node apparatus used as a representative of 1st Embodiment. The figure which shows an example of the ring network system provided with two ring networks in 1st and 2nd Example. The figure which shows two logical ring networks and one logical communication path in 1st Example (relocation). The figure which shows having deleted the setting regarding a logical communication path in two nodes of FIG. The figure which shows having deleted the setting regarding a logical communication path in all the nodes in which the logical communication path of FIG. 9 was set. The figure which shows the state which received the setting change instruction | indication frame in the port 833 of the node 83 of FIG. The figure which shows that the transfer of the logical communication path set to the logical ring network of FIG. 8 was completed. The figure which shows two logical ring networks and two logical communication paths in 2nd Example (exchange). The figure which shows having deleted the setting regarding the two logical communication paths of FIG. The figure which shows that replacement | exchange of two logical communication paths set to the logical ring network of FIG. 8 was completed. The functional block diagram of the ring node apparatus which concerns on 2nd Embodiment. The functional block diagram of the representative communication apparatus which is a ring node apparatus which becomes a representative of 2nd Embodiment.

Hereinafter, a ring network system, a ring network changing method, and a ring node device according to embodiments of the present invention will be described with reference to the drawings. Note that, in the following embodiments, the same numbered portions are assumed to perform the same operation, and repeated description is omitted. Note that the ring network system, the ring network changing method, and the ring node device of the present disclosure can be applied to the information communication industry.
In this specification, a network composed of nodes (also referred to as node devices) connected in a ring by applying a ring protocol is referred to as a “logical ring network” (simply abbreviated as “ring network” or “ring”). A virtual communication path connecting bases set on the logical ring network is referred to as a “logical communication path”. For example, “logical communication path” corresponds to a VLAN in Ethernet (registered trademark), and “logical ring network” corresponds to a ring instance in a ring protocol. A ring network system indicates a system including a plurality of ring node devices that construct a logical ring network to which a ring protocol is applied.

  In general, it is difficult for a node on which a ring protocol is implemented to change a setting related to a logical ring network in a state where a service is provided after a logical ring network is once constructed. If it is processing such as addition or deletion of a node, it is possible to realize the processing even when the service is provided by using the redundancy function of the logical ring network. However, in a state where the service is provided, a node belonging to a certain logical ring network is changed to belong to another logical ring network, that is, a logical communication path belonging to a certain logical ring network is changed to another logical ring network. It is difficult to perform setting change processing across a plurality of logical ring networks, such as relocation.

  As a relocation process between ring networks, for example, a new logical ring network (hereinafter referred to as a relocation destination logical ring network) triggered by an increase in the amount of traffic flowing on the network due to an increase in subscribers or addition of services. And relocating the source logical ring by moving a part of the traffic from the logical ring network (hereinafter referred to as the relocation source logical ring network) that had been providing services before the expansion of the logical ring network to the relocation destination logical ring network. It is conceivable to realize load distribution between the network and the relocation destination logical ring network. In such a case, it is necessary to change the setting related to the logical communication path between the node belonging to the relocation source logical ring network and the node belonging to the relocation destination logical ring network.

  Specifically, as a processing procedure for realizing the change of the logical ring network, (1) a setting relating to a logical communication path is added to the transfer destination logical ring network, and (2) a logical communication path from the transfer source logical ring network. Two processes of deleting the setting are necessary. However, when a plurality of nodes constituting the ring network execute these two processes in an arbitrary order, a logical loop may occur. When a logical loop occurs in a logical ring network using Ethernet technology, there is a possibility that communication is stopped due to the occurrence of a broadcast storm caused by the logical loop.

First, an example in which a logical loop is generated when changing settings related to a logical communication path in two logical ring networks will be described with reference to FIGS.
The network system shown in FIG. 1 includes a first logical ring network including nodes 11 to 16 and via physical lines 18-1 to 18-6, and physical lines 19-1 to 19 including nodes 11, 13, and 17. -3 through the second logical ring network.
The node 11 includes ports 111 and 112 constituting the first logical ring network, ports 113 and 114 constituting the second logical ring network, and a port 115 connected to the access accommodating node 1a via the physical line 11a. Is provided.
The node 12 includes ports 121 and 122 constituting the first logical ring network.
The node 13 includes ports 131 and 132 constituting the first logical ring network, ports 133 and 134 connected to the second logical ring network, and a port 135 connected to the access accommodating node 1b via the physical line 13b. Is provided.
The node 14 includes ports 141 and 142 constituting the first logical ring network.
The node 15 includes ports 151 and 152 constituting the first logical ring network.
The node 16 includes ports 161 and 162 constituting the first logical ring network.
The node 17 includes ports 173 and 174 constituting the second logical ring network.

  Next, the first logical ring network 20-1 and the second logical ring network 20-2 will be described with reference to FIG. A logical communication path can be set in the logical ring network. Here, a logical communication path 21 is set in the logical ring network 20-1. Further, a logical communication path 22a is set for the physical line 11a between the node 11 and the access accommodating node 1a, and a logical communication path 22b is set for the physical line 13b between the node 13 and the access accommodating node 1b. Yes. In both the nodes 11 and 13, since the logical communication path 21 is set in the logical ring network 20-1, the access accommodating nodes 1a and 1b are connected to the logical communication path 22a, the logical communication path 21, and the logical communication path 22b. It is possible to communicate with each other via

  The first logical ring network 20-1 uses the port 112 as a blocked port, and the second logical ring network 20-2 uses the port 114 as a blocked port. Thus, by designating a blocked port in each logical ring network, the occurrence of a logical loop in the logical communication path 21 is avoided. If one blocked port is set in one logical ring network, no logical loop occurs in the logical communication path of this logical ring network.

(Relocation of logical communication path)
In the network composed of two logical ring networks having the physical setting and logical setting shown in FIGS. 1 and 2, the logical communication path 21 is moved from the first logical ring network 20-1 to the second logical ring network 20-2. The procedure to do is described. As described above, in order to relocate the logical communication path 21, (1) a setting related to the logical communication path 21 is added to the second logical ring network 20-2 to be relocated, and (2) the relocation source and It is necessary to complete the two processes of deleting the setting relating to the logical communication path 21 from the first logical ring network 20-1.

  Specifically, the nodes 12, 14, 15, and 16 belonging only to the first logical ring network 20-1 perform processing for deleting the setting related to the logical communication path 21 from the first logical ring network 20-1. Implement for each port. The node 17 belonging to only the second logical ring network 20-2 performs a process for adding a setting relating to the logical communication path 21 to the second logical ring network 20-2 for each port of each node. The nodes 11 and 13 belonging to both the first logical ring network 20-1 and the second logical ring network 20-2 add processing related to the logical communication path 21 to the second logical ring network 20-2. And the process which deletes the setting regarding the logical communication path 21 from the 1st logical ring network 20-1 is implemented for every port of each node.

An example in which the setting related to the logical communication path 21 is added to the second logical ring network 20-2 in the node 11 will be described with reference to FIG.
Since the setting related to the logical communication path 21 is not deleted from the first logical ring network 20-1, both the port where the first logical ring network is set and the port where the second logical ring network is set, that is, The settings relating to the logical communication path 21 are held in the ports 111 to 114. On the other hand, since the nodes 12 to 17 have not been changed in the settings related to the logical ring network and the logical communication path, communication using the logical communication path 21 set in the logical ring network 20-2 cannot be performed at this time. .

  Thereafter, as shown in FIG. 4, it is assumed that the setting related to the logical communication path 21 is added to the second logical ring network 20-2 at the node 17. At this time, since the logical communication path 21 is established between the node 11 and the node 17, communication between the node 11 and the node 17 becomes possible.

  Furthermore, as shown in FIG. 5, it is assumed that a setting related to the logical communication path 21 is added to the second logical ring network 20-2 at the node 13. However, at this time, a logic loop that passes through the nodes 11, 17, 13, 14, 15, 16, and 11 in this order is generated.

  In this way, a plurality of nodes constituting two or more logical ring networks can perform additional processing for setting a logical communication path to the logical ring network in an arbitrary order, and setting for a logical communication path from the logical ring network. When the deletion process is executed, a logic loop may occur.

[First Embodiment]
(First ring node device)
A first ring node device (also referred to as a ring node. Also simply referred to as a node) according to the first embodiment of the present invention will be described with reference to FIG. The first ring node device according to the first embodiment uses a tag VLAN capable of setting a plurality of logical communication paths in one port, and sets a part of logical communication paths set in the ring, This is for use when moving to a ring port where another ring is set. In a logical communication path irrelevant to relocation or exchange in the ring network system, it moves to another ring port without changing the relationship between the ring port and the logical communication path. In addition, the ring network system and the ring network changing method of this embodiment will be described below.
The ring node 6 includes a plurality of ring ports 61-1 to 61-n (n is a natural number and an even number), a ring-communication channel setting change instruction analyzing unit 62, a ring-communication channel correspondence setting state monitoring unit 63, a ring -A communication channel setting changing unit 64, a logical ring setting notification unit 65, a logical communication channel setting management unit (port) 66, and a ring-communication channel correspondence setting unit 67. The ring port 61-1 and the ring port 61-2 are ports constituting the first logical ring network, and the ring port 61-3 and the ring port 61-4 are ports constituting the second logical ring network. When generalized here, the ring port 61-n-1 and the ring port 61-n are ports constituting the n / 2th logical ring network.

  In the present embodiment, the setting related to the logical communication path is deleted from the first logical ring network, and the setting related to the logical communication path is added to the second logical ring network, that is, from the first logical ring network that is the transfer source. An example will be described in which a logical communication path is relocated to the second logical ring network to be relocated.

  This relocation of the logical communication path is executed through a setting change instruction frame. The setting change instruction frame relates to information related to “a logical communication path subject to setting change”, information related to “a logical ring network from which a logical communication path is moved”, and “logical ring network to which a logical communication path is moved”. Contains information. The setting change instruction frame is generated, for example, by a representative communication device described later and transmitted to another node.

  The ring node 6 realizes the node setting change by using these pieces of information included in the setting change instruction frame, and changes the configuration of the logical ring network system. For example, a VID (VLAN ID) may be used as information relating to a logical communication path, and a ring instance ID (hereinafter abbreviated as “ring ID”) assigned to each logical ring network as information relating to a logical ring network. That is, the setting change instruction frame may include the VID, the ring ID of the ring that is the transfer source, and the ring ID of the ring that is the transfer destination.

  The ring-communication path setting change instruction analyzing unit 62 analyzes the setting change instruction frame received at one or more of the ring ports 61-1 to 61-n. Information relating to “the logical communication path to be changed”, information relating to “the logical ring network to which the logical communication path is transferred”, and information relating to “the logical ring network to which the logical communication path is transferred” are extracted. Further, the ring-communication path setting change instruction analysis unit 62 transmits the extracted information to the ring-communication path setting change unit 64.

  In this embodiment, the node belonging to both the logical ring network that is the transfer source of the logical communication path and the logical ring network that is the transfer destination of the logical communication path is triggered by the reception of the setting change instruction frame. Subsequent to the process of “deleting the setting related to the logical communication path from the logical ring network that is the transfer source”, the process of “adding the setting related to the logical communication path to the logical ring network that is the transfer destination of the logical communication path” is executed.

  In order to specify the port for which the setting is to be changed, information related to the port for which “the logical ring network that is the transfer source of the logical communication path” is set, and “the logical ring network that is the transfer destination of the logical communication path” are Information about configured ports is required. Therefore, the ring-communication channel correspondence setting state monitoring unit 63 acquires the settings related to the logical ring network held by the logical ring setting notification unit 65, and sets the settings related to the logical ring network and the logical communication channel to the ring-communication channel setting. It transmits to the change part 64.

  On the other hand, the instruction content instructed by the setting change instruction frame is not illegal, for example, there is no inconsistency between the setting before applying the setting change processing and the instruction content instructed by the setting change instruction frame. In order to determine whether or not, a setting before applying the setting change process may be acquired. In this case, the ring-communication channel correspondence setting state monitoring unit 63 acquires the information held by the logical ring setting notification unit 65 and the logical communication channel setting management unit (port) 66, and the ring-communication channel setting changing unit. 64.

  The ring-communication path setting changing unit 64 receives information related to “a logical communication path subject to setting change” received from the ring-communication path setting change instruction analysis unit 62 and information related to “a logical ring network from which a logical communication path is relocated”. And the ring-communication path correspondence setting based on the information related to the “logical ring network to which the logical communication path is relocated” and the setting before the setting change process received from the ring-communication path correspondence setting state monitoring unit 63. change. The ring-communication path correspondence setting is a setting related to the association between the logical ring network and the logical communication path.

The logical ring setting notification unit 65 sets a logical ring network for one or two of the plurality of ring ports 61-1 to 61-n, and performs switching and recovery operations according to the state of the logical ring network. To control the communication conduction or stop state in the logical communication path on the ring ports 61-1 to 61-n. At this time, the logical ring setting notification unit 65 configures a first logical ring network for, for example, the ring ports 61-1 and 61-2, and a second logical ring network for the 61-3 and 61-4. Thus, a plurality of logical ring networks in which ring ports are freely combined can be configured.
The logical ring setting notification unit 65 only notifies the ring-communication channel correspondence setting unit 67 of the correspondence information between the ring port and the logical ring network, and does not participate in the change of the port in which the logical communication channel is set.

  The logical communication path setting management unit (port) 66 sets one or a plurality of logical communication paths for one or more of the plurality of ring ports 61-1 to 61-n, and identifies the logical communication path. Control is performed to enable communication with an identifier or the like.

  The ring-communication path correspondence setting unit 67 performs communication on the logical communication path at the ring port (some of 61-1 to 61-n) in which the logical ring network and the logical communication path are set. Correspondence between a logical ring network and a logical communication path is performed in order to enable conduction or stop according to the state. The ring-communication path setting changing unit 64 changes the correspondence between the logical ring network and the logical communication path, thereby changing the logical communication path to another port.

As a result, when the logical communication path is relocated rather than exchanged, the first logical ring network that is the relocation source of the logical communication path, the second logical ring network that is the relocation destination of the logical communication path, or logical communication When a setting change instruction frame is received from both the first logical ring network that is the path transfer source and the second logical ring network that is the transfer destination of the logical communication path, Delete the settings related to the logical communication path in all ports where the first logical ring network is set. "And" Logical in all ports where the second logical ring network to which the logical communication path is transferred are set. " It is possible to add a setting relating to a communication path. In addition, among the nodes constituting the logical ring network, the nodes belonging to both the first logical ring network and the second logical ring network are defined as “from the first logical ring network from which the logical communication path is relocated”. It is possible to "add the setting related to the logical communication path to the second logical ring network to which the logical communication path is relocated" after deleting the setting related to the communication path, resulting in the ring network without causing a logical loop. It becomes possible to change the system configuration.
On the other hand, when exchanging the first logical communication path and the second logical communication path, the first logical ring network, which is one logical ring network for exchanging the logical communication path, is replaced with the logical communication path. Triggered by receiving a setting change instruction frame from the second logical ring network, which is one logical ring network, or from both the first logical ring network and the second logical ring network that exchange logical channels. "Delete the setting related to the first logical communication path in all ports where the first logical ring network is set" and "Second logical communication in all ports where the second logical ring network is set." Delete the setting related to the second logical communication path ”on all ports where the first logical ring network is set. Setting Add "and that it is possible to" add settings for the first logical communication channel in the second all the ports to which the logical ring network is set for ". In addition, among the nodes constituting the logical ring network, the nodes belonging to both the first logical ring network and the second logical ring network are configured as follows: “Set the first logical communication path from the first logical ring network. "Delete" and then "Add the setting for the first logical communication path to the second logical ring network" and "Delete the setting for the second logical communication path from the second logical ring network" It is possible to add a setting relating to the second logical communication path to the logical ring network, and as a result, it is possible to change the configuration of the ring network system without generating a logical loop.

  The logical ring network includes nodes belonging only to the first logical ring network, nodes belonging only to the second logical ring network, both the first logical ring network and the second logical ring network. However, it is not necessary to transmit the setting change instruction frame by distinguishing them. Information related to "logical ring network that is the transfer source of the logical communication path" and information related to "logical ring network that is the transfer destination of the logical communication path" included in the setting change instruction frame, and the ring and port held by each node Whether the node that received the setting change instruction frame from the information on the correspondence relationship with is a node that belongs only to the first logical ring network, a node that belongs only to the second logical ring network, or It is possible to determine whether the node belongs to both the first logical ring network and the second logical ring network. For this reason, without distinguishing the node configuration, “the logical communication network to be changed” for the first logical ring network and the second logical ring network, “the logical ring network from which the logical communication path is transferred” And, it is only necessary to transmit a setting change instruction frame including information relating to the “logical ring network to which the logical communication path is relocated”.

  In addition, a node belonging only to the logical ring network that is the transfer source of the logical communication path performs only the process of “deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path” and moves the logical communication path. A node belonging only to the logical ring network that is the destination performs only the process of “adding the setting related to the logical communication path to the logical ring network that is the transfer destination of the logical communication path”. In addition, since these nodes include only the first logical ring network or the second logical ring network, the occurrence of the logical loop is not affected.

Next, a representative communication device (also referred to as a representative ring node or a representative node device) of this embodiment will be described with reference to FIG. The representative communication device is typically one of a plurality of ring node devices constituting the ring network system, and executes setting addition processing or deletion processing regarding the logical communication path.
The representative communication device 7 includes a setting change instruction unit (input) 71 and a setting change instruction unit (output) 72 in addition to the functional blocks of FIG.

The setting change instruction unit (output) 72 includes a node belonging to the logical ring network that is the transfer source, a node that belongs to the logical ring network that is the transfer destination, and a logical ring network that is the transfer source and the logical ring network that is the transfer destination. For all of the nodes belonging to both, “Delete the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path” and “Setting related to the logical communication path to the logical ring network that is the transfer destination of the logical communication path A setting change instruction frame for performing both of the processes of “add” is notified.
The setting change instruction frame includes a node belonging to the logical ring network to be moved, a node belonging to the logical ring network to be moved, and a node belonging to both the logical ring network to be moved and the logical ring network to be moved. It is sufficient to reach all of the nodes, and there is no restriction on the transmission order.

  That is, a setting change instruction frame is transmitted from a port in which a logical ring network that is a transfer source of a logical communication path is set, and after this setting change instruction frame goes around the logical ring network that is a transfer source of a logical communication path, A setting change instruction frame may be transmitted from a port in which a logical ring network that is a transfer destination of a communication path is set.

  Alternatively, a setting change instruction frame is transmitted from a port in which a logical ring network that is a transfer destination of the logical communication path is set, and after this setting change instruction frame goes around the logical ring network that is the transfer destination of the logical communication path, The setting change instruction frame may be transmitted from a port in which a logical ring network that is a transfer path source is set.

  Alternatively, a setting change instruction frame may be transmitted simultaneously from both a port in which a logical ring network as a transfer source of a logical communication path is set and a port in which a logical ring network as a transfer destination of a logical communication path is set. Good.

  Furthermore, the setting change instruction unit (input) 71 receives a setting change instruction frame when a node belonging to both the logical ring network that is the transfer source of the logical communication path and the logical ring network that is the transfer destination of the logical communication path is received. For example, a setting change instruction frame is received from a logical ring network that is a transfer source of a logical communication path, a setting change instruction frame is received from a logical ring network that is a transfer destination of a logical communication path, or a logical communication path The logical ring network that is the transfer source of the logical communication path is set when one of the settings change instruction frames is received from both the logical ring network that is the transfer source and the logical ring network that is the transfer destination of the logical communication path. The logical port network that is the source of the transfer of the logical communication path Delete the setting related to the path ”and, following this process, for the port where the logical ring network to which the logical communication path is transferred is set, the logical communication to the logical ring network to which the logical communication path is transferred The process of “adding the setting regarding the road” is performed.

  Note that the setting change instruction section (input) 71 and the setting change instruction section (output) 72 are described as separate bodies here, but may be the same body as long as they have similar functions.

  The ring network system, the ring network change method, and the ring node device according to the present embodiment are characterized in that the ring-communication path setting change unit 64 is a logic that becomes a transfer source of a logical communication path when receiving a setting change instruction frame. The setting related to the correspondence between the logical ring network and the logical communication path is changed for all the ports in which the logical ring network to which the ring network and the logical communication path are to be transferred are set. That is, when a setting change instruction frame is received at a node belonging to a plurality of logical ring networks such as the first logical ring network and the second logical ring network, Subsequent to the process of “deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the communication path”, the process of “adding the setting related to the logical communication path to the logical ring network that is the transfer destination of the logical communication path” is executed. . In order to prevent a logical loop from occurring, a node belonging to both the first logical ring network and the second logical ring network among the respective nodes constituting the logical ring network is designated as “the logic from which the logical communication path is relocated”. After “deleting the setting related to the logical communication path from the ring network”, it is necessary to “add the setting related to the logical communication path to the logical ring network to which the logical communication path is relocated”.

  Here, the process of “deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path” and the process of “adding the setting related to the logical communication path to the logical ring network that is the transfer destination of the logical communication path” In order to avoid reversing the processing order of, "Delete the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path" and "Settings related to the logical communication path to the logical ring network that is the transfer destination of the logical communication path The setting change instruction frame for continuously executing the process of “adding” is used.

  That is, the setting change instruction frame for the process of “deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path” at the port in which the logical ring network that is the transfer source of the logical communication path is set When the logical ring network that is the transfer destination of the logical communication path is set to the port where the logical ring network that is the transfer destination of the logical communication path is set, the logical ring network that is the transfer destination of the logical communication path is Rather than adding a setting related to a logical communication path when a setting change instruction frame is received for the processing of “adding a setting”, a setting related to a logical communication path is triggered when a single setting change instruction frame is received. Subsequent to the process of deleting the setting, a process of adding a setting related to the logical communication path is performed.

  The setting change instruction frame is generated in the representative communication device. The representative communication device is a node that belongs to both the logical ring network that is the relocation source and the logical ring network that is the relocation destination, and that has a blocked port in those rings. That is, the representative communication device can be uniquely determined.

  According to the first embodiment described above, it is possible to change the configuration of the ring network while avoiding the logic loop based on the setting change instruction from the representative communication device. In other words, it is possible to provide a ring network system, a ring network changing method, and a ring node device that can change the shape of a ring after the construction of the ring network. In addition, according to the first embodiment, for example, it can be used when a logical communication path set by a tag VLAN is relocated from a logical ring network as a relocation source to a logical ring network as a relocation destination. In the first embodiment, a logical communication path can be relocated to another logical ring network for each logical communication path in which a specific tag, that is, a logical communication path identifier is set.

(Ring network first embodiment: relocation)
Next, as a specific example, an example of relocation in a ring network system will be described with reference to FIGS. Here, an example is shown in which a logical communication path is relocated in the logical ring network set in the ring network system of FIG. In addition, the ring node apparatus of 1st Embodiment and 2nd Embodiment is applicable to the following 1st Examples and 2nd Examples.

The network system shown in FIG. 8 includes nodes 81 to 86, a first logical ring network that passes through physical lines 88-1 to 88-6, and nodes 81, 83, 84, and 87, and includes a physical line 89-1. To 89-4 through the second logical ring network.
The node 81 is connected to the ring port 811 and 812 constituting the first logical ring network, the ring port 813 and 814 constituting the second logical ring network, and the access accommodating node 8a via the physical line 81a. A port 815 is provided. FIG. 8 also shows a port 816 connected to the access accommodating node 8b via the physical line 81b, which is used when exchanging two logical communication paths in the second embodiment later.
The node 82 includes ring ports 821 and 822 constituting the first logical ring network.
The node 83 is connected to the access accommodating node 8c via the physical line 83c and the ring ports 831 and 832 constituting the first logical ring network, the ring ports 833 and 834 constituting the second logical ring network. A port 835 is provided.
The node 84 includes ring ports 841 and 842 constituting the first logical ring network and ring ports 843 and 844 constituting the second logical ring network. FIG. 8 also shows a port 845 connected to the access accommodating node 8d via the physical line 84d, which is used in the second embodiment later.
The node 85 includes ring ports 851 and 852 that constitute the first logical ring network.
The node 86 includes ring ports 861 and 862 constituting the first logical ring network.
The node 87 includes ring ports 873 and 874 that constitute a second logical ring network.
Here, one of the nodes 81 to 87 may be the representative ring node in FIG. 7, and all the others may be the ring node 6 illustrated in FIG. 6. One of the nodes 81 to 87 may be the representative ring node 180 in FIG. 18, and all the others may be the ring node 170 illustrated in FIG. 17.

Next, the logical ring network of this embodiment will be described with reference to FIG.
As described above, the first logical ring network 90-1 and the second logical ring network 90-2 are set. A logical communication path can be set in the logical ring network. Here, a logical communication path 91 is set in the logical ring network 90-1. Further, a logical communication path 94a is set for the physical line 81a between the node 81 and the access accommodating node 8a, and a logical communication path 94c is set for the physical line 83c between the node 83 and the access accommodating node 8c. Since the logical communication path 91 is set in the logical ring network 90-1 in any of the nodes 81 and 83 and other nodes that relay communication between the nodes, the access accommodating nodes 8a and 8c are in logical communication. It is possible to communicate with each other via the path 94a, the logical communication path 91, and the logical communication path 94c.

  The first logical ring network 90-1 has a ring port 812, and the second logical ring network 90-2 has a ring port 814 as a blocked port. Thus, by designating a blocked port in the logical ring network, the occurrence of a logical loop in one logical ring network having the blocked port is avoided.

  Hereinafter, the node 81 is a representative communication device, and the setting relating to the logical ring network and the logical communication path is changed in all the nodes 81 to 87 by transmitting a setting change instruction frame from the node 81, and the first logical ring network A method for moving the logical communication path 91 from 90-1 to the second logical ring network 90-2 will be described. That is, the first logical ring network is the logical ring network that is the transfer source of the logical communication path, and the second logical ring network is the logical ring network that is the transfer destination of the logical communication path, and logical communication is performed between the two logical ring networks. The method for relocating the road will be described.

  The node 81 as the representative communication device transmits a “setting change instruction frame regarding the logical communication path 91” to the first logical ring network 90-1. The representative communication apparatus transmits a setting change instruction frame to the first logical ring network 90-1 that is a transfer source of the logical communication path, and after the setting change instruction frame makes a round of the first logical ring network 90-1. The setting change instruction frame may be transmitted to the second logical ring network 90-2 that is the transfer destination of the logical communication path. Alternatively, the representative communication device transmits a setting change instruction frame to the second logical ring network 90-2 that is a transfer destination of the logical communication path, and the setting change instruction frame makes a round of the second logical ring network 90-2. After that, the setting change instruction frame may be transmitted to the first logical ring network 90-1, which is the transfer source of the logical communication path. Alternatively, the representative communication device simultaneously sends a setting change instruction frame to the first logical ring network 90-1 that is the transfer source of the logical communication path and the second logical ring network 90-2 that is the transfer destination of the logical communication path. You may send it. Regardless of the setting change instruction frame transmission method, the nodes belonging to both the first logical ring network and the second logical ring network are connected to the logical communication path from the logical ring network from which the logical communication path is relocated. Since “setting is deleted” and “settings related to the logical communication path are added to the logical ring network to which the logical communication path is relocated”, a logical loop does not occur. However, depending on the transmission method of the setting change instruction frame, it may take a long time to stop communication between access accommodating nodes.

  In this embodiment, a setting change instruction frame is transmitted to the first logical ring network 90-1 that is a transfer source of the logical communication path, and after this setting change instruction frame makes a round of the first logical ring network 90-1. A case will be described in which a setting change instruction frame is transmitted to the second logical ring network 90-2 which is a transfer destination of the logical communication path.

  The node belonging to both the logical ring network that is the transfer source of the logical communication path and the logical ring network that is the transfer destination of the logical communication path that has received the setting change instruction frame is the logical interface specified in the setting change instruction frame. At the port where the logical ring network from which the communication path is to be transferred is set, the processing for deleting the setting related to the logical communication path from the logical ring network is performed, and this process is followed by the “logical At the port where the logical ring network that is the transfer destination of the communication path is set, a process of “adding the setting related to the logical communication path to the logical ring network” is executed. Note that a node belonging only to the logical ring network that is the transfer source of the logical communication path performs only the process of “deleting the setting related to the logical communication path from the logical ring network”. Further, a node belonging only to the logical ring network to which the logical communication path is relocated performs only the process of “adding the setting related to the logical communication path to the logical ring network”.

  For example, when a setting change instruction frame including the content “relocating the logical communication path 91 from the first logical ring network 90-1 to the second logical ring network 90-2” is received at the port 821 of the node 82, The settings related to the logical communication path 91 are deleted from the first logical ring network 90-1 at the port 821 and the port 822 where the first logical ring network 90-1 to be the transfer source of the logical communication path 91 is set. . Since the node 82 belongs only to the first logical ring network 90-1 that is the transfer source of the logical communication path 91, the process for adding the setting related to the logical communication path 91 to other logical ring networks is not performed.

  Further, when a setting change instruction frame including the content “transfer the logical communication path 91 from the first logical ring network 90-1 to the second logical ring network 90-2” is received at the port 831 of the node 83, The settings related to the logical communication path 91 are deleted from the first logical ring network 90-1 in the port ports 831 and 832 in which the first logical ring network 90-1 that is the transfer source of the logical communication path 91 is set. . In addition, after the setting of the logical communication path 91 is deleted, the port ports 833 and 834 in which the second logical ring network 90-2 that is the transfer destination of the logical communication path 91 is set after the deletion processing are set in the first port. A setting relating to the logical communication path 91 is added to the second logical ring network 90-2.

  In this embodiment, the nodes belonging to both the first logical ring network 90-1 that is the transfer source of the logical communication path and the second logical ring network 90-2 that is the transfer destination of the logical communication path are the logical communication paths. This deletion process is performed after executing the process of `` deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path '' when the setting change instruction frame is received from the logical ring network that is the transfer source of Continuing from the above, the processing of “adding the setting related to the logical communication path to the logical ring network to which the logical communication path is moved” is performed, but the setting change instruction frame is received from the logical ring network to which the logical communication path is moved. The logical ring network from which the logical communication path is moved and the logical ring network from which the logical communication path is moved Triggered by receiving a setting change instruction frame from either the logical ring network that is the transfer source of the logical communication path or the logical ring network that is the transfer destination of the logical communication path , "Deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path", and following this deletion process, to the logical ring network that is the transfer destination of the logical communication path A process of “adding settings” may be performed.

  Next, in the nodes 82 and 83, the state of the logical ring network and the logical communication path after the setting relating to the logical communication path is deleted is shown in FIG. As shown in FIG. 10, since the logical communication path setting is deleted from the ports 831 and 832 of the node 83, communication using the logical communication path between the access accommodating nodes 8a and 8c is stopped.

Next, the setting change instruction frame makes a round of the first logical ring network 90-1, and in all nodes belonging to the first logical ring network 90-1, from the ring port where the first logical ring network is set. FIG. 11 shows a state where the setting of the logical communication path 91 is deleted.
In this embodiment, the nodes belonging to both the first logical ring network 90-1 that is the transfer source of the logical communication path and the second logical ring network 90-2 that is the transfer destination of the logical communication path are the logical communication paths. In response to the reception of the setting change instruction frame from the logical ring network that is the transfer source of the network, a process of “deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path” is performed, and the deletion process is continued. , Belonging to the first logical ring network 90-1 and the second logical ring network 90-2 in order to perform the process of “adding the setting related to the logical communication path to the logical ring network to which the logical communication path is relocated” In the nodes 81, 83, and 84, the setting related to the logical communication path 91 is added to the second logical ring network 90-2. That.

  When the node 81, which is the representative communication device, receives the setting change instruction frame that makes a round of the first logical ring network 90-1, the logical ring network that is the transfer destination of the logical communication path, that is, the second logical ring network 90 is obtained. -2 transmits a setting change instruction frame.

Next, FIG. 12 shows a state where the setting change instruction frame is received at the port 833 of the node 83.
In the node 83, when the setting change instruction frame related to the logical communication path 91 is received at the port 831 in which the first logical ring network 90-1 that is the transfer source of the logical communication path is set, the logical communication path 91 is moved. In the ports 831 and 832 in which the original first logical ring network 90-1 is set, “settings related to the logical communication path 91 are deleted from the first logical ring network 90-1 that is the transfer source of the logical communication path. Further, in the ports 833 and 834 in which the second logical ring network 90-2 to be the transfer destination of the logical communication path 91 is set, “the second logical ring network 90 to be the transfer destination of the logical communication path”. -2 is added ". Therefore, it is not necessary to perform the setting change process again when the setting change instruction frame is received at the port 833. In addition, as shown in FIG. 12, although the setting regarding the logical communication path 91 is added to the second logical ring network 90-2 in the ports 833 and 834 of the node 83, the second logical ring of the other node device. Since the setting for the logical communication path is not completed at the port where the network is set, the communication using the logical communication path between the access accommodating nodes 8a and 8c continues to stop.

  Next, the setting change instruction frame goes around the second logical ring network 90-2, and in all nodes belonging to the second logical ring network 90-2, the ring logical port is set to the ring port where the second logical ring network is set. FIG. 13 shows a state in which settings relating to the logical communication path 91 are added. When the setting related to the logical communication path 91 is completed in all the nodes belonging to the second logical ring network 90-2, the logical communication path between the access accommodating nodes 8a and 8c is restored, and the communication is restored. In the process of moving the logical communication path, no logical loop occurs.

  In this way, by sending a setting change instruction frame to each of the first logical ring network and the second logical ring network, the setting change instruction is notified to all nodes, and the first logical ring network And a node belonging to both the second logical ring network, a process of “deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path” is performed. By adding the setting relating to the logical communication path to the logical ring network to which the path is to be transferred ”, the logical communication path can be transferred between the two logical ring networks without generating a logical loop.

(Ring network second embodiment: exchange)
Next, as a specific example, an example of exchange in the ring network system will be described with reference to FIGS. 8 and 14 to 16. Here, an example is shown in which two logical communication paths are exchanged in the logical ring network set in the network configuration of FIG.
The logical ring network of the present embodiment will be described with reference to FIG.
As described above, the first logical ring network 90-1 and the second logical ring network 90-2 are set. A logical communication path can be set in the logical ring network. Here, a logical communication path 92 (first logical communication path) is set in the logical ring network 90-1, and a logical communication path 93 (second logical communication path) is set in the logical ring network 90-2. Further, a logical communication path 94a is provided for the physical line 81a between the node 81 and the access accommodation node 8a, and a logical communication path 94b, a node 83 and the access accommodation node are provided for the physical line 81b between the node 81 and the access accommodation node 8b. A logical communication path 94c is set for the physical line 83c between the nodes 8c, and a logical communication path 94d is set for the physical line 84d between the node 84 and the access accommodating node 8d.

  Since the logical communication path 92 is set in the logical ring network 90-1 in any of the nodes 81 and 83 and other nodes that relay communication between the nodes, the access accommodating nodes 8a and 8c are in logical communication. It is possible to communicate with each other via the path 94a, the logical communication path 92, and the logical communication path 94c. Further, since the logical communication path 93 is set in the logical ring network 90-2 in any of the nodes 81 and 84 and other nodes that relay communication between the nodes, the access accommodating nodes 8b and 8d It is possible to communicate with each other via the logical communication path 94b, the logical communication path 93, and the logical communication path 94d.

  The first logical ring network 90-1 uses the port 812 as a blocked port, and the second logical ring network 90-2 uses the port 814 as a blocked port. Thus, by designating a blocked port in the logical ring network, the occurrence of a logical loop in one logical ring network having the blocked port is avoided.

  Here, the node 81 is a representative communication device, and the setting change instruction frame is transmitted from the node 81 to change the association setting between the logical ring network and the logical communication path in all the nodes 81 to 87, The logical communication path 92 is moved from the logical ring network 90-1 to the second logical ring network 90-2, and the logical communication path 93 is transferred from the second logical ring network 90-2 to the first logical ring network 90-1. The method of relocating is described. That is, a method for exchanging logical communication paths between the first logical ring network and the second logical ring network will be described with reference to FIGS. 14, 15, and 16. FIG.

  The logical communication path can be exchanged by executing the relocation of the logical communication path shown in the first embodiment of the logical ring network twice by exchanging the relocation source logical ring network and the relocation destination logical ring network. It is. However, in the process of relocation, two logical communication paths coexist temporarily in one logical ring network, and there is a possibility that it cannot be realized due to restrictions on the bandwidth resources of the logical ring network. In the present embodiment, the logical communication path can be exchanged between the two logical ring networks regardless of the limitation of the bandwidth resources of the logical ring network.

  The node 81, which is a representative communication device, transmits a setting change instruction frame to the first ring network 90-1 and the second ring network 90-2. The representative communication apparatus transmits a setting change instruction frame to the first logical ring network 90-1, and after this setting change instruction frame makes a round of the first logical ring network 90-1, the second logical ring network 90-1. -2 may transmit a setting change instruction frame. Alternatively, the representative communication device transmits a setting change instruction frame to the second logical ring network 90-2, and after this setting change instruction frame makes a round of the second logical ring network 90-2, A setting change instruction frame may be transmitted to the network 90-1. Alternatively, the representative communication device may simultaneously transmit the setting change instruction frame to the first logical ring network 90-1 and the second logical ring network 90-2. Regardless of the setting change instruction frame transmission method, the nodes belonging to both the first logical ring network and the second logical ring network are connected to the logical communication path from the logical ring network from which the logical communication path is relocated. Since “setting is deleted” and “settings related to the logical communication path are added to the logical ring network to which the logical communication path is relocated”, a logical loop does not occur. However, depending on the transmission method of the setting change instruction frame, it may take a long time to stop communication between access accommodating nodes.

  In this embodiment, a setting change instruction frame is transmitted to the first logical ring network 90-1, and after this setting change instruction frame makes a round of the first logical ring network 90-1, the second logical ring network 90-1 is transmitted. -2 describes the case where a setting change instruction frame is transmitted.

The setting change instruction frame includes a setting change instruction for the logical communication path 92 to be transferred from the first logical ring network 90-1 to the second logical ring network 90-2, and the first logical ring network 90-2 to the first logical ring network 90-2. Both of the setting change instructions regarding the logical communication path 93 to be transferred to the logical ring network 90-1 may be included, or two setting change instructions may be divided into two setting change instruction frames. In the present embodiment, an example will be described in which a setting change instruction regarding the logical communication path 92 and a setting change instruction regarding the logical communication path 93 are included in one setting change instruction frame.
As described above, in this embodiment as well, as in the first embodiment, all setting change instructions may be included in the setting change instruction frame.

  The nodes belonging to both the logical ring network that is the transfer source of the logical communication path that has received the setting change instruction frame and the logical ring network that is the transfer destination of the logical communication path are connected to the logical communication path specified in the setting change instruction frame. At the port where the logical ring network that is the transfer source is set, the processing for deleting the setting related to the logical communication path from the logical ring network is performed. Subsequently to this process, the “logical communication path setting” indicated in the setting change instruction frame is performed. At the port where the logical ring network to be relocated is set, a process of “adding a setting related to the logical communication path to the logical ring network” is executed. In the case of the present embodiment, the setting relating to the logical communication path 92 from the first logical ring network 90-1 and the setting relating to the logical communication path 93 are deleted from the second logical ring network 90-2, and this deletion process is continued. Then, processing for adding the setting related to the logical communication path 93 to the first logical ring network 90-1 and the setting related to the logical communication path 92 to the second logical ring network 90-2 is executed.

  In addition, a logical loop will not occur unless the order of “deleting the setting related to the logical communication path from the logical ring network” and “adding the setting related to the logical communication path to the logical ring network” is changed for each logical communication path. Therefore, there is no restriction on the processing order between two or more logical communication paths. That is, if each of the logical communication paths 92 and 93 satisfies the order restriction such as “delete the setting related to the logical communication path from the logical ring network” and then “add the setting related to the logical communication path to the logical ring network”. For example, following the process of deleting the setting related to the logical communication path 92 from the first logical ring network 90-1, the setting related to the logical communication path 92 is added to the second logical ring network 90-2, and the second logical ring The setting may be changed in the order of adding the setting related to the logical communication path 93 to the first logical ring network 90-1 following the process of deleting the setting related to the logical communication path 93 from the network 90-2.

  Next, the setting change instruction frame makes a round of the first logical ring network 90-1, and in all the nodes belonging to the first logical ring network 90-1, the logical port is set from the port where the first logical ring network is set. FIG. 15 shows a state where the setting related to the communication path 92 is deleted and the setting related to the logical communication path 93 is deleted from the port where the second logical ring network is set.

  In the present embodiment, the nodes belonging to both the first logical ring network 90-1 and the second logical ring network 90-2 receive the setting change instruction frame and receive settings for the logical communication path from the logical ring network. The first logical ring network 90-1 and the second logical ring network are added to the logical ring network that is the facility destination of the deleted logical communication path following the process of deleting the logical communication path. In the nodes 81, 83, and 84 belonging to 90-2, the logical communication path 92 is set in the second logical ring network 90-2, and the logical communication path 93 is set in the first logical ring network 90-1. Has been added. In the nodes 82, 85, and 86 belonging only to the first logical ring network 90-1, the setting of the logical communication path 93 is added in the first logical ring network 90-1. By completing the setting of the logical communication path 93 in all the nodes belonging to the first logical ring network 90-1, the logical communication path between the access accommodating nodes 8b and 8d is restored, and communication is restored.

  When the node 81, which is the representative communication device, receives the setting change instruction frame that makes a round of the first logical ring network 90-1, the logical ring network that is the target of the logical communication path exchange, that is, the second logical ring network 90. -2 transmits a setting change instruction frame.

  FIG. 16 shows a state in which the setting change instruction frame makes a round of the second logical ring network 90-2 and the setting related to the logical communication path 92 is added to the port where the second logical ring network is set. In the present embodiment, the nodes 81, 83, 84 belonging to both the first ring network 90-1 and the second logical ring network 90-2 are transmitted to the first ring network 90-1. Subsequent to the process of deleting the setting related to the logical communication path from the logical ring network based on the setting change instruction frame, the process of adding the setting related to the logical communication path to the logical ring network to be exchanged is completed. For this reason, only the node 87 belonging to only the second ring network 90-2 changes the settings related to the logical ring network and the logical communication path based on the setting change instruction frame transmitted to the second logical ring network 90-2. To do. In the process of exchanging the logical communication path, a logical loop does not occur.

  As shown in the above embodiment, the setting change instruction is notified to all the nodes by transmitting the setting change instruction frame to each of the first logical ring network and the second logical ring network, and In the nodes belonging to both the first logical ring network and the second logical ring network, following the process of “deleting the setting related to the logical communication path from the logical ring network”, the logical communication to the logical ring network to be replaced By adding the setting regarding the path ”, the logical communication path can be exchanged between the two logical ring networks without generating a logical loop.

[Second Embodiment]
(Second ring node device)
A second ring node device (also referred to as a ring node or simply referred to as a node) according to the second embodiment of the present invention will be described with reference to FIG. The ring node device according to the second embodiment uses a port VLAN that sets one logical communication path in one port, and all logical communication paths set in the ring are transferred to ring ports in which another ring is set. It is for use when moving. It moves to another port without changing the relationship between the port and the logical communication path. In addition, the ring network system and the ring network changing method of this embodiment will be described below.
The ring node device according to the second embodiment is applied to the first and second examples described above.

  The ring node 170 includes a plurality of ring ports 1701-1 to 1701-n, a ring-port setting change instruction analyzing unit 1702, a ring-port correspondence setting state monitoring unit 1703, a ring-port setting changing unit 1704, a logic A ring setting changing unit 1705 and a logical channel setting management unit (ring) 1706 are provided. The ring port 1701-1 and the ring port 1701-2 are ports that constitute the first logical ring network, and the ring port 1701-3 and the ring port 1701-4 are ports that constitute the second logical ring network. When generalized here, the ring port 1701-n-1 and the ring port 1701-n are ports constituting the n / 2 logical ring network.

  In the present embodiment, as in the first embodiment, an example in which a logical communication path is relocated from a first logical ring network that is a relocation source to a second logical ring network that is a relocation destination will be described.

  The setting change instruction frame includes the same information as in the first embodiment. That is, the setting change instruction frame includes information related to “a logical communication path to be changed”, information related to “a logical ring network that is a transfer source of the logical communication path”, and “a logical ring network that is a transfer destination of the logical communication path” Is included. Similarly to the first embodiment, the ring node 170 also uses the information included in the setting change instruction frame to change the setting of the node and change the configuration of the logical ring network system. For example, a VID (VLAN ID) may be used as information relating to a logical communication path, and a ring ID assigned to each ring network may be used as information relating to a logical ring network. That is, the setting change instruction frame may include the VID, the ring ID of the ring that is the transfer source, and the ring ID of the ring that is the transfer destination.

  The ring-port setting change instruction analyzing unit 1702 is substantially the same as the ring-communication path setting change instruction analyzing unit 62. That is, the ring-port setting change instruction analyzing unit 1702 analyzes the instruction content of the setting change instruction frame received at one or more of the ring ports 1701-1 to 1701-n. Specifically, the ring-port setting change instruction analysis unit 1702 determines, based on the instruction content, information related to “the logical communication path subject to setting change”, “information related to the logical ring network from which the logical communication path is relocated”, and “logical Information regarding the “logical ring network to which the communication path is relocated” is extracted, and the extracted information is transmitted to the ring-port setting changing unit 1704.

  In this embodiment, the ring-port correspondence setting state monitoring unit 1703 is a ring-port in a node belonging to both a logical ring network that is a transfer source of a logical communication path and a logical ring network that is a transfer destination of a logical communication path. Following the process in which the setting change unit 1704 receives the setting change instruction frame to “delete the setting related to the logical communication path from the logical ring network that is the transfer source of the logical communication path”, the ring-port correspondence setting state monitoring unit 1703 executes a process of “adding a setting relating to a logical communication path to a logical ring network to which a logical communication path is to be relocated”. In order to specify the port for which the setting is changed, it is related to the port in which the logical ring network that is the transfer source of the logical communication path is set and the port in which the logical ring network that is the transfer destination of the logical communication path is set Information is needed. Therefore, the ring-port correspondence setting state monitoring unit 1703 acquires the settings related to the logical ring network held by the logical ring setting change unit 1705 and transmits the settings related to the logical ring network and the port to the ring-port setting change unit 1704. To do.

  On the other hand, it is determined whether the instruction content instructed by the setting change instruction frame is invalid or, for example, whether the setting before applying the setting change processing and the instruction content instructed by the setting change instruction frame are inconsistent. In order to do this, the setting before applying the setting change process may be acquired. In this case, the ring-port correspondence setting state monitoring unit 1703 acquires information held by the logical ring setting change unit 1705 and the logical channel setting management unit (ring) 1706 and transmits the information to the ring-port setting change unit 1704. To do.

  The ring-port setting change unit 1704 receives information from the ring-port setting change instruction analysis unit 1702 relating to “the logical communication path subject to setting change”, “information relating to the logical ring network from which the logical communication path is transferred”, and The ring-port correspondence setting is changed based on the information related to the “logical ring network to which the logical communication path is relocated” and the setting before the setting change processing received from the ring-port correspondence setting state monitoring unit 1703.

The logical ring setting changing unit 1705 sets a logical ring network for one or two of the plurality of ring ports 1701-1 to 1701-n, and switches and restores according to the state of the logical ring network. The operation is performed, and the communication conduction or stop state in the logical communication path on the ring ports 1701-1 to 1701-n is controlled. At this time, the logical ring setting changing unit 1705 configures a first logical ring network for the ring ports 1701-1 and 1701-2, for example, and a second logical ring network for the 1701-3 and 1701-4. Thus, a plurality of logical ring networks in which ring ports are freely combined can be configured.
In other words, the logical ring setting changing unit 1705 can change the logical communication path set in the ring to another port by changing the correspondence information between the ring port and the logical ring network. On the other hand, in the first embodiment, the logical ring setting notification unit 65 only notifies the ring-communication channel correspondence setting unit 67 of the correspondence information between the ring port and the logical ring network, and the logical communication channel is set. Does not participate in port changes. In the first embodiment, the ring-communication path correspondence setting unit 67 changes the correspondence between the logical ring network and the logical communication path, thereby changing the logical communication path to another port.

The logical channel setting management unit (ring) 1706 associates the logical channel with the logical ring network set by the logical ring setting change unit 1705. At this time, by making the logical communication path correspond to the logical ring network, it is possible to perform communication with an identifier or the like for identifying the logical communication path at the ring port in which the logical ring network is set, and Communication can be conducted or stopped depending on the state of the logical ring.
Other effects of the present embodiment are the same as those of the first embodiment.

Next, the representative communication device of this embodiment will be described with reference to FIG.
The representative communication device 180 further includes a setting change instruction unit (input) 1801 and a setting change instruction unit (output) 1802 in addition to the functional blocks of FIG.

  A setting change instruction unit (output) 1802 is similar to the setting change instruction unit (output) 72. Further, the setting change instruction unit (input) 1801 is the same as the setting change instruction unit (input) 71.

  In addition to the rules regarding the transmission order of the setting change instruction frames transmitted from the representative communication device 180, the ring-port setting changing unit 1704 included in the ring node device 170 of the non-representative communication device “ A restriction such as “do not add a setting related to a logical communication path that has not been deleted from the ring network to the logical ring network that is the transfer destination of the logical communication path” may be added (this is also the same as in the first embodiment).

  As a result, in the second embodiment, as in the first embodiment, it is possible to change the setting related to the port that has received the setting change instruction frame. In the second embodiment, as in the first embodiment, among the nodes constituting the logical ring network, the nodes belonging to both the first logical ring network and the second logical ring network are logical communication paths. It is possible to add a logical communication path to another logical ring network after deleting the setting related to the logical communication path from the logical ring network that is the transfer source of the logical ring network. As a result, the logical ring network can be configured without generating a logical loop. It becomes possible to change. Other effects are similar to those of the first embodiment.

  Note that the setting change instruction unit (input) 1801 and the setting change instruction unit (output) 1802 have been described as separate bodies here, but they may of course be the same body as long as they have similar functions.

  The second embodiment described above can be used when, for example, a logical communication path set by a port VLAN is relocated from a logical ring network that is a relocation source to a logical ring network that is a relocation destination. In the second embodiment, all the logical communication paths set to a specific port can be transferred to another port at a time. The other effects of the second embodiment are the same as those of the first embodiment.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

DESCRIPTION OF SYMBOLS 1a, 1b ... Access accommodation node, 6 ... Ring node, ring node apparatus, 7 ... Representative ring node, representative communication apparatus, 8a, 8b, 8c, 8d ... Access accommodation node, 11-17 ... Node, 11a, 13b, 18 -1 to 18-6, 19-1 to 19-3, physical lines, 20-1, 20-2, logical ring networks, 21, 22a, 22b, logical communication paths, 61-1 to 61-n, ring ports 62 ... Ring-communication channel setting change instruction analysis unit, 63 ... Ring-communication channel correspondence setting state monitoring unit, 64 ... Ring-communication channel setting change unit, 65 ... Logical ring setting notification unit, 66 ... Logical communication channel setting management Part (port), 67 ... ring-communication path correspondence setting part, 71 ... setting change instruction part (input), 72 ... setting change instruction part (output), 81 to 87 ... node, 81a, 81b, 83c, 84d 88-1 to 88-6, 89-1 to 89-4 ... physical line, 90-1, 90-2 ... logical ring network, 91, 92, 93, 94a, 94b, 94c, 94d ... logical communication path, 111 115, 121, 122, 131 to 135, 141, 142, 151, 152, 161, 162, 173, 174 ... port, 170 ... ring node, ring node device, 180 ... representative ring node, representative communication device, 811 814, 821, 822, 831-834, 841-844, 851, 852, 861, 862, 873, 874 ... ring port, 815, 816, 835, 845 ... port, 1701-1-1701-n ... ring port, 1702 ... Ring-port setting change instruction analysis unit, 1703 ... Ring-port correspondence setting state monitoring unit, 1704 ... Grayed - port setting changing unit, 1705 ... logical ring configuration change unit, 1706 ... logical communication path setting management unit (ring), 1801 ... setting change instruction unit (input), 1802 ... setting change instruction section (output).

Claims (6)

Included in at least one of the first logical ring network and the second logical ring network to which a ring protocol is applied that forms a logical ring network and sets a logical communication path enabling communication in the logical ring network A ring node device,
A setting including first information related to a logical communication path whose setting is to be changed, second information related to a logical ring network serving as a transfer source of the logical communication path, and third information related to a logical ring network serving as a transfer destination of the logical communication path. Receiving a change instruction, and based on the first information, the second information, the third information, and the fourth information about the logical ring network set in the own device, the logical communication path corresponding to each logical ring network A change section for changing the setting;
Based on the first information, the second information, the third information, and the fourth information, the settings related to the logical ring network and the logical communication path are deleted from all the ports where the first logical ring network is set. A ring node device comprising a setting unit for adding a setting related to a logical ring network and a logical communication path in all ports where the second logical ring network is set following deletion of the setting. A setting change instruction analyzing unit that analyzes the received setting change instruction and extracts the first information, the second information, and the third information;
The apparatus further comprises a setting changing unit that changes a setting of correspondence between a logical ring network and a logical communication path or a ring port according to the first information, the second information, and the third information. The ring node device described in 1. In a ring network system comprising a plurality of node devices for constructing a logical ring network to which a ring protocol is applied,
A setting including first information related to a logical communication path whose setting is to be changed, second information related to a logical ring network serving as a transfer source of the logical communication path, and third information related to a logical ring network serving as a transfer destination of the logical communication path. A change instruction is transmitted, and all of the first logical ring network set based on the first information, the second information, the third information, and the fourth information related to the logical ring network set in the own device Delete the settings related to the logical ring network and the logical communication path in the port, and add the settings related to the logical ring network and the logical communication path in all the ports where the second logical ring network is set following the deletion of this setting. A representative node device;
When receiving the setting change instruction, and based on the first information, the second information, the third information, and the fourth information, the logical communication path belongs to the first logical ring network and the logical communication path When the determination is made, the setting related to the logical communication path is deleted from the first logical ring network at all ports where the first logical ring network is set, and the first information, the second information, and the third information are deleted. And when the second logical ring network is determined to belong to the second logical ring network and the logical communication path based on the fourth information, the second logical ring network is set to the second logical ring network. A ring network system comprising: another node device that adds a setting related to a logical communication path to the logical ring network. In a ring network changing method in a ring network system including a plurality of node devices for constructing a logical ring network to which a ring protocol is applied,
A setting including first information related to a logical communication path whose setting is to be changed, second information related to a logical ring network serving as a transfer source of the logical communication path, and third information related to a logical ring network serving as a transfer destination of the logical communication path. Send change instructions,
Based on the first information, the second information, the third information, and the fourth information related to the logical ring network set in the own device, the logical ring network in all ports where the first logical ring network is set Delete the settings related to the logical channel,
Following the deletion of this setting, add settings related to the logical ring network and logical communication path for all ports where the second logical ring network is set,
When receiving the setting change instruction, and based on the first information, the second information, the third information, and the fourth information, the logical communication path belongs to the first logical ring network and the logical communication path If determined, delete the setting related to the logical communication path from the first logical ring network in all the ports where the first logical ring network is set,
Based on the first information, the second information, the third information, and the fourth information, if it is determined that the logical communication path belongs to the second logical ring network and the logical communication path, A ring network changing method comprising: adding a setting related to a logical communication path to a second logical ring network at all ports in which the logical ring network is set. In a ring network system comprising a plurality of node devices for constructing a logical ring network to which a ring protocol is applied,
First information regarding the logical communication path whose setting is to be changed, fifth information regarding the first logical ring network for exchanging the logical communication path, and sixth regarding the second logical ring network for exchanging the logical communication path The first logical ring network is transmitted on the basis of the first information, the fifth information, the sixth information, and the fourth information related to the logical ring network set in the own device. Delete the settings related to the first logical ring network and the first logical communication path in all the ports for which the second logical ring network is set. Add the setting for the first logical communication path to the second logical ring network, and all the settings for the second logical ring network Delete the setting related to the second logical communication path from the second logical ring network at the port, and subsequently to the deletion of this setting, the first logical ring network is set to the first logical ring network at all ports where the first logical ring network is set. A representative node device for adding settings relating to the second logical communication path;
When the setting change instruction is received and based on the first information, the fifth information, the sixth information, and the fourth information, it is determined that the setting change instruction belongs only to the first logical ring network that exchanges the logical communication path Deletes the setting related to the first logical communication path from the first logical ring network at all ports where the first logical ring network is set, and sets the second logical communication path to the first logical ring network. If it is determined that it belongs only to the second logical ring network that exchanges the logical communication path, the first logical ring network is connected to the second logical ring network at all ports in which the second logical ring network is set. Adding a setting related to the logical communication path and deleting another setting related to the second logical communication path from the second logical ring network, Obtain ring network system. In a ring network changing method in a ring network system including a plurality of node devices for constructing a logical ring network to which a ring protocol is applied,
First information regarding the logical communication path whose setting is to be changed, fifth information regarding the first logical ring network for exchanging the logical communication path, and sixth regarding the second logical ring network for exchanging the logical communication path Send setting change instruction including information,
Based on the first information, the fifth information, the sixth information, and the fourth information related to the logical ring network set in the own device, the first logical ring network is set to the first in all ports in which the first logical ring network is set. Delete the settings related to the logical ring network and the first logical communication channel,
Following the deletion of this setting, the setting related to the first logical communication path is added to the second logical ring network at all ports where the second logical ring network is set.
Delete the settings related to the second logical communication path from the second logical ring network in all ports where the second logical ring network is set,
Following the deletion of this setting, the setting related to the second logical communication path is added to the first logical ring network at all ports where the first logical ring network is set.
When the setting change instruction is received and based on the first information, the fifth information, the sixth information, and the fourth information, it is determined that the setting change instruction belongs only to the first logical ring network that exchanges the logical communication path Deletes the setting related to the first logical communication path from the first logical ring network at all ports where the first logical ring network is set, and sets the second logical communication path to the first logical ring network. Add
If it is determined that it belongs only to the second logical ring network for which the logical communication path is exchanged, the first logical communication path is related to the second logical ring network at all ports where the second logical ring network is set. A ring network changing method comprising adding a setting and deleting a setting relating to a second logical communication path from the second logical ring network.