CN102546345A - Method for realizing cross-ring protection of resilient packet ring by use of spanning tree protocol - Google Patents
Method for realizing cross-ring protection of resilient packet ring by use of spanning tree protocol Download PDFInfo
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Abstract
The invention relates to a distributed collection processing system and method of internet metadata. The distributed collection processing system comprises a configuration management graphical user interface module, a metadata collecting assembly module and a metadata output module, wherein the configuration management graphical user interface module is used for collecting distributed assembly parameter configuration, collecting metadata and searching input logs; the metadata collecting assembly module is used for reading metadata collection configuration of each service application system, periodically establishing and executing a collection mission dispatching program in a distributed manner, and generating metadata extensible markup language files required by each service application system; and the metadata output module is in charge of outputting the metadata extensible markup language files to each service application system. Each service application system disclosed by the invention has the advantages that universal and open distributed assemblies and services are provided for the internet metadata, so that a uniform and standard data source is provided for further realizing in-station accurate search of an internet television and vertical search of content aggregation type applications.
Description
Technical field
The present invention relates to RPR (RPR; Resilient Packet Ring) and Spanning-Tree Protocol (STP; Spanning Tree Protocol) technical field; Mainly being a kind of method of utilizing Spanning-Tree Protocol to realize the protection of RPR transannular, particularly is in RPR transannular node configuration Spanning-Tree Protocol, realizes reliable transmission and redundancy protecting that the RPR transannular is professional.
Background technology
RPR is that data-oriented is professional, is applicable to the light ring network of metropolitan area network scope.At present by IEEE (U.S.'s electrical equipment and the Institute of Electrical and Electronics Engineers of Electronic Engineering Association) 802.17 working groups standardization.RPR is a twin nuclei, is made up of ring and outer shroud in the opposite direction.
The key features of RPR is following:
1, topological automatic discovering
RPR automatic topological discover mechanism does not need manual operation, can realize encircling the newly-increased of node, and deletion and recovery realize that dynamically topological structure upgrades.
2, space reuse
The RPR twin nuclei, two rings carry out transfer of data simultaneously, bandwidth sharing and statistic multiplexing in the supporting ring.For multimedia broadcast/multicast service, website receives only and transmits packet, peels off packet from ring up to the Source Site, and for unicast service, website can judge that peeling off still is the forwarding packet, improves bandwidth usage efficient.RPR can recycle the bandwidth of having distributed and untapped bandwidth is redistributed.
3, service classification
RPR is divided into A with business, B, and three types of C, A service guarantees minimum-time lag in the bandwidth of distributing, transmit real time business; B service guarantees limited time delay in the bandwidth of distributing, transmit non-real-time service; C service transmits as possible.
4, fair algorithm
Take place through the weight of fair algorithm is set, can make different nodes that different access rates is arranged when congested at the RPR website, guarantee that justice is enjoyed bandwidth between the competition website.Node can be provided with different weights at interior ring and outer shroud respectively.
5, protection is switched
RPR provide switching time at 50ms with interior fast looped network wrap protection, comprise that Wrapping and Steering pattern .Wrapping protection is equivalent to the loopback at disconnected fine place, switching time is fast, but is not optimal path.Optimal path is selected in the Steering protection, but guard time is slow.
Fig. 1 is the RPR sketch map of four websites, ring outer shroud in comprising.Data service is perhaps transmitted on the ring of client's appointment according to selecting corresponding ring to the minimum node path of destination node experience.
The logic function figure of RPR website is as shown in Figure 2; Four-headed arrow above exchange chip is represented the external ethernet port of RPR website; Other data class equipment can be connected,, when test, test instrumentation can be connected such as the ethernet port of switch and router.Internal port is meant the port that is connected with the RPR process chip on the exchange chip, and the data service that responsible handle need transmit on the RPR ring sends to the RPR process chip.The effect of exchange chip is to accomplish between outside port and the outside port Layer 2 data function of exchange between outside port and the internal port.The RPR process chip is accomplished going up of data service and is encircled following ring, functions such as data forwarding.
Because the technical advantage of RPR is used widely at metropolitan area network, many data traffic transmission need be crossed over a plurality of RPRs, bring the problem of data service transannular reliable transmission.The simplest a kind of solution is as shown in Figure 3.Need be sent to 23 websites from 11 websites such as data service, only need set up physical connection at the external ethernet port of 12 websites and 24 websites, professional meeting to 12 websites, be sent to 23 websites through 24 websites from 11 websites.But encircle 1 and encircle 2 between have only a physical connection, if physical connection is damaged, ring 1 can interrupt with the transfer of data of ring 2.If 12 websites or 24 websites break down, ring 1 also can interrupt with the transfer of data of ring 2, does not reach reliable transmission.
In order to reach the professional reliable transmission of transannular, can between two RPRs, set up at least 2 transmission paths, accomplish redundancy protecting.The transannular that Fig. 4 describes is connected with 2 transmission paths, but the website that this usage can cause encircling is received the data of repetition, and broadcast storm in network, occurs, causes network unavailable.Website 11 such as ring 1 sends a broadcast packet, and broadcast packet can be stripped from up to getting back to 11 websites in ring 1 broadcasting.12 websites are received broadcast packet, can be sent to broadcast packet ring 2 and encircle broadcasting on 2 through 24 websites, and 13 websites receive that broadcast packet can be sent to broadcast packet ring 2 and encircle 2 broadcasting through 23 websites equally, encircles 2 like this and can receive 2 parts of broadcast packets and broadcasting on ring.The broadcast packet that ring 2 is received through 24 websites can be sent to 23 websites; 23 websites can send to ring 1 to broadcast packet again and in ring 1 broadcasting, encircle 2 broadcast packets received through 23 websites equally and can be sent to 24 websites through 13 websites, and 24 websites can send to ring 1 to broadcast packet and in ring 1 broadcasting through 12 websites; Ring 1 can be received 2 parts of extra broadcast packets; That does not stop moves in circles, and ring 1 can form broadcast storm with ring 2, and consume network bandwidth causes network unavailable.When having 2 transmission paths of surpassing to connect between any 2 RPRs, also there is the broadcast storm of foregoing description, and more serious.When between any 3 or the above RPR ring be connected to form loop the time, even have only 1 transmission paths between per two RPR ring, also can produce broadcast storm and cause network unavailable.
Spanning-Tree Protocol is defined among the IEEE 802.1D, is a kind of LMP Link Manager Protocol, prevents to produce loop simultaneously for network provides path redundancy.Connect protocol Data Unit through the emigrant between the bridge and exchange state information separately; Through spanning tree algorithm, create loop-free tree type logical topology structure then, guarantee that bridge is selected an optimal path under multipath; Open-loop prevents the generation of broadcast storm in logic.If circuit breaks down, optimal path lost efficacy, and can recomputate network path and find out next bar network path through spanning tree algorithm, and the port of disconnection is activated, restoring communication.
RSTP [RSTP, Rapid Spanning Tree Protocol] is defined among the 802.1W, is development and come on the basis of 802.1D.The RSTP agreement can restrain network faster when network topology changes, Duoed two kinds of port types than 802.1D: alternate port type and backup port type.
The Spanning-Tree Protocol that this paper mentions comprises STP and RSTP.
Fig. 5 is a kind of typical switch usage, and the quantity of real network situation switch and port can be more than Fig. 5, and connects more complicacy between the switch, and artificially making exchanger loop is in order to do redundancy protecting under many circumstances.Setting forth for convenient, is the course of work that example is set forth Spanning-Tree Protocol with Fig. 5.Switch 1,2,3 interconnect, and form loop, and broadcast storm can take place, and cause network unavailable.At first configuration switch 1,2, and 3 bridge id comprises MAC Address and priority, and the bridge id that switch 1 is set is minimum, all joins the Spanning-Tree Protocol port to the port one of 3 switches and port 2 then, enables Spanning-Tree Protocol at last.According to spanning tree algorithm, can select bridge id minimum make the root bridge, all of the port of root bridge all is the designated ends mouth, gets into forwarding state, so switch 1 is the root bridge, its port one and 2 all is the designated ends mouth, transmits data.All the other bridges can be according to the path cost value of the mulitpath that arrives Root Bridge, and the path of selecting the minimal path overhead value is to the root bridge.The path cost of GE is 4, and the path cost of FE is 19, and switch 2 is 4 through port 2 to the path cost of root bridge, is 23 through port one to the path cost of root bridge, so select port 2 as root port.Switch 3 is 8 through port 2 to the path cost of root bridge, is 19 through port one to the path cost of root bridge, so select port 2 to do root port.The port one of switch 2 is transmitted data, and the port one of switch 3 gets clogged, and does not accept to transmit data, and loop breaks off at the port one of switch 3 in logic, just can not form broadcast storm.
When connecting interruption between switch 2 and 3, spanning tree algorithm can recomputate, and as root port, cancellation is blocked, and with switch 1 proper communication, guarantees professional operate as normal, accomplishes redundancy protecting the port one of switch 3.When connect recovering between switch 2 and 3, spanning tree algorithm can recomputate, and blocks the port one of switch 3 once more, port 2 as root port.
Summary of the invention
RPR is used widely in metropolitan area network, and the transannular that the transmission of data service transannular need provide the redundancy protecting path to prevent to produce broadcast storm limits simultaneously RPR is again used.The objective of the invention is to overcome the deficiency product of above-mentioned technology, and the method for utilizing Spanning-Tree Protocol to realize the protection of RPR transannular is provided, utilize Spanning-Tree Protocol, avoid the transannular transmission broadcast storm to occur; When operating path interrupted, transmission transannular in protection path was professional, and the assurance business is not interrupted, and improves the reliability of transannular transmission.
The present invention solves the technical scheme that its technical problem adopts: this method of utilizing Spanning-Tree Protocol to realize the protection of RPR transannular, and the concrete steps of this method are:
(1), confirm the loop that RPR transannular transmission forms, analyze whole network topology, find out the transannular node of each RPR, confirm that transannular is transmitted in the loop that forms between each RPR;
(2), in the MAC Address and the priority of each transannular node configuration bridge id, the port that forms the transannular node loop adds the Spanning-Tree Protocol port, the dispense path overhead value enables to move Spanning-Tree Protocol;
(3), each transannular node is is regularly received and dispatched each other and is handled Bridge Protocol Data Unit; Select the minimum transannular node of bridge id as the root bridge; According to the path cost value of each transannular node port, select the minimum path of path cost value as operating path to the root bridge; The port of maximum path overhead value gets into blocked state, becomes to stop forwarding but can continue to receive and handle the port blocked of Bridge Protocol Data Unit, as the backup path that stops forwarding data, confirms the unique path of each transannular node to the root bridge thus; Because the transannular linkloop is eliminated, and can not produce broadcast storm, data are reliably transmitted.
Further, the port that said transannular node forms loop comprises the RPR port.
Further, according to topology the path cost value of port is set, the port that guarantees to interrupt in logic transmission is the transannular connectivity port.
Further; When transannular transmission operating path or transannular node generation aborted; Adjacent transannular node is not being received the Bridge Protocol Data Unit of opposite end above certain hour, and each the transannular node-tree algorithm that enables spanning-tree feature can recomputate, and port blocked is activated; Again open in logic, data are transmitted in the backup path transmission; The transannular business is protected, and data are reliably transmitted.After aborted was recovered, spanning tree algorithm recomputated the path cost value of each transannular node to the root bridge according to Bridge Protocol Data Unit, got into step (2), the maximum port blocked of Turn Off Path overhead value in logic, and the transannular node is as backup path accordingly.
The effect that the present invention is useful is:
1, implements simply to utilize Spanning-Tree Protocol, need not develop additional functionality and just solve RPR transannular reliable transmission, accomplish redundancy protecting and suppress broadcast storm.
2, Spanning-Tree Protocol is a standard agreement, is defined among 802.1D and the 802.1W, and the butt joint of being convenient between the devices from different manufacturers is used.
Description of drawings
Fig. 1 is single RPR sketch map;
Fig. 2 is the logic function sketch map of single RPR website;
Fig. 3 has only 1 transannular to connect sketch map between two RPRs;
Fig. 4 has 2 transannulars to connect sketch map between two RPRs;
Fig. 5 is used for setting forth the Spanning-Tree Protocol operation principle.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with for example.Should be appreciated that described hereinly, and be not used in qualification the present invention for example only in order to explaining the present invention.
Core of the present invention is in RPR transannular node configuration Spanning-Tree Protocol, and through regularly receiving and dispatching Bridge Protocol Data Unit, the loop of transannular node is eliminated, and can not form broadcast storm.When operating path or transannular node generation aborted, the Bridge Protocol Data Unit message can be overtime, and Spanning-Tree Protocol can recomputate, and port blocked is activated, and the backup path transport service guarantees the reliable transmission that transannular is professional.When aborted was recovered, Bridge Protocol Data Unit was was normally received and dispatched, and operating path transmits the transannular business again, and backup path gets clogged.
Understand in depth for the present invention is had intuitively, the practical implementation method of the method for the invention is as shown in Figure 4, may further comprise the steps:
1, confirm the loop that the transmission of RPR transannular forms, in Fig. 4, have ring 1 with encircling between 2, two rings two transannular transmission paths to be arranged, 12 transannular nodes of ring 1 are connected with 24 transannular nodes of ring 2, and 13 transannular nodes of ring 1 are connected with the 23 transannular nodes that encircle 2.12,24,23,13 four transannular nodes form loop.Connect mutually between 3 or the above RPR, have only 1 transmission paths between per two rings, also can form loop.The present invention is applicable to all transannular that forms loop transmission, is not limited to topological structure shown in Figure 4.
2, the bridge id of configuration transannular node 12,24,23,13, the port that forms the transannular node loop joins the Spanning-Tree Protocol port.The bridge id that transannular node 12 is set is minimum, between the configuration 12 and 24 path cost be the path cost between 4,24 and 23 be path cost between 4,23 and 13 be between 19,13 and 12 path cost be 4, enable to move Spanning-Tree Protocol then.
3,12,24,23,13 transannular nodes can regularly be received and dispatched the Bridge Protocol Data Unit message.Through spanning tree algorithm, select the minimum conduct root bridge of bridge id, 12 transannular nodes can be as the root bridge.12 transannular nodes and 24,13 transannular node connectivity ports can become designated port, and 24,23,13 transannular nodes can be selected the minimum path of path cost value according to the path cost value to the root bridge.24 transannular nodes are 27 to select counterclockwise the path to 12 transannular nodes greater than anticlockwise path cost value 4,24 transannular nodes to 12 transannular nodes path cost value clockwise.13 transannular nodes are 4 to select clockwise the path to 12 transannular nodes less than anticlockwise path cost value 27,13 transannular nodes to 12 transannular nodes path cost value clockwise.23 transannular nodes are selected counterclockwise to 12 transannular nodes greater than counter clockwise direction path cost value 8,23 transannular nodes to 12 transannular node clockwise direction path cost values 23.23 transannular nodes are closed to the connection of 13 transannular nodes in logic, become port blocked, as backup path.The transannular transport service suppresses broadcast storm through path transmission between 12 transannular nodes and the 24 transannular nodes.
4, transmission path aborted between 12 transannular nodes and the 24 transannular nodes; The Bridge Protocol Data Unit that 12 and 24 transannular nodes are received and dispatched each other can be overtime, and spanning tree algorithm confirms that the path is unavailable between the 12 and 24 transannular nodes, opens port blocked; Activate the backup path between the 13 and 23 transannular nodes in logic; Normal transmitting and receiving service guarantees transannular transport service operate as normal, accomplishes redundancy protecting.
5, the transmission path between 12 transannular nodes and the 24 transannular nodes recovers; 12 and 24 transannular nodes are received and dispatched Bridge Protocol Data Unit each other; Recovered in the path between spanning tree algorithm confirmed 12 and 24, operate as normal, close in logic 23 with 13 transannular nodes between be connected; Open between the 12 and 24 transannular nodes and connect the path transmission between 12 and 24 transannular nodes once more of transannular business.
In sum, the present invention utilizes Spanning-Tree Protocol to eliminate the loop that the transmission of RPR transannular produces, and suppresses broadcast storm.When transannular transmission operating path lost efficacy, enable subsequent use transmission path through Spanning-Tree Protocol, guarantee professional normal transmission.
It is understandable that, for a person skilled in the art, technical scheme of the present invention and inventive concept are equal to replacement or change the protection range that all should belong to the appended claim of the present invention.
Claims (4)
1. one kind is utilized Spanning-Tree Protocol to realize the method that the RPR transannular is protected, and it is characterized in that: the concrete steps of this method are:
(1), confirm the loop that RPR transannular transmission forms, analyze whole network topology, find out the transannular node of each RPR, confirm that transannular is transmitted in the loop that forms between each RPR;
(2), in the MAC Address and the priority of each transannular node configuration bridge id, the port that forms the transannular node loop adds the Spanning-Tree Protocol port, the dispense path overhead value enables to move Spanning-Tree Protocol;
(3), each transannular node is is regularly received and dispatched each other and is handled Bridge Protocol Data Unit; Select the minimum transannular node of bridge id as the root bridge; According to the path cost value of each transannular node port, select the minimum path of path cost value as operating path to the root bridge; The port of maximum path overhead value gets into blocked state, becomes to stop forwarding but can continue to receive and handle the port blocked of Bridge Protocol Data Unit, as the backup path that stops forwarding data, confirms the unique path of each transannular node to the root bridge thus.
2. the method for utilizing Spanning-Tree Protocol to realize the protection of RPR transannular according to claim 1 is characterized in that: the port that said transannular node forms loop comprises the RPR port.
3. the method for utilizing Spanning-Tree Protocol to realize the protection of RPR transannular according to claim 1 is characterized in that: according to topology the path cost value of port is set, the port that guarantees to interrupt in logic transmission is the transannular connectivity port.
4. the method for utilizing Spanning-Tree Protocol to realize the protection of RPR transannular according to claim 1 is characterized in that:
When (1), transannular transmits operating path or transannular node generation aborted; Adjacent transannular node is not being received the Bridge Protocol Data Unit of opposite end above certain hour; Each the transannular node-tree algorithm that enables spanning-tree feature can recomputate; Port blocked is activated, and opens again in logic, and data are transmitted in the backup path transmission;
(2), after aborted is recovered; Spanning tree algorithm recomputates the path cost value of each transannular node to the root bridge according to Bridge Protocol Data Unit; Get into step (2), the maximum port blocked of Turn Off Path overhead value in logic, corresponding transannular node is as backup path.
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Application publication date: 20120704 |