CN106411625A - Link message packet loss measurement method and system, target node and initiator node - Google Patents

Abstract

The method and system for detecting the packet loss rate of link messages provided by the invention, as well as the target node and the initiator node, belong to the communication field. The target node receives the packet loss calculation information LMM message sent by the initiator node. The LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested; the target node judges whether it is a node to be tested according to the location information; If it is the node to be tested, count the number of packets received from the initiator node; the target node obtains the link according to the number of packets received from the initiator node and the number of packets sent by the initiator node Packet loss rate. Compared with the existing technology, it has the positioning information of the node to be tested, and can locate the position of the intermediate node between the end and the end. After positioning, the LMM message defined in various current OAM standards can be used to perform link packet loss Rate detection, which realizes the detection of the link packet loss rate of end-to-end intermediate nodes.

Description

Link packet loss measurement method, system, target node, and initiator node

technical field

The invention relates to the communication field, in particular to a link message packet loss measurement method, system, target node, and initiator node.

Background technique

Link packet loss measurement is a common network maintenance function. Accurate and fast packet loss measurement is extremely important for network maintenance. The definition of OAM is based on the actual needs of the operator's network operation, and usually divides the management work of the network into three categories: Operation, Administration, and Maintenance, referred to as OAM. Operation mainly completes the analysis, prediction, planning and configuration of the daily network and services; maintenance mainly refers to the daily operation activities such as testing and fault management of the network and its services. OAM functions can be divided into: fault management: such as fault measurement, fault classification, fault location, fault notification, etc.; performance management: such as performance monitoring, performance analysis, performance management control, etc.; protection recovery: such as protection mechanism, recovery mechanism, etc. The LM function of OAM (that is, the frame loss measurement function) is used to count the difference in the number of service frames sent and received between the ingress and egress of a point-to-point T-MPLS connection, and to calculate the number of link packet loss and packet loss. Currently commonly used OAM-related standards (1) MPLS-TP OAM (BHH): can be divided into TMS, TMP, and TMC, which are used to monitor the connectivity and performance of the segment layer, tunnel layer, and pseudowire layer respectively. It can be applied to various MPLS-TP networks. Based on the main standards: Y.1731 and MPLS-TP standards, for the LM of the TMP and TMC layers, only PE-PE packet loss measurement can be measured. (2) CFM: It is a kind of Ethernet OAM, based on the main standards: 802.1ag and Y1731, and the frame loss measurement function is defined in the Y.1731 standard.

The LM function of the two OAMs provides an end-to-end (PE to PE node) packet loss measurement. For PE to any P node, it cannot provide link packet loss measurement, which has certain limitations in actual network maintenance work. defect.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a link packet loss measurement method, system, target node, and initiating node, so as to solve the existing problems that can only be measured for end-to-end link packet loss and cannot The problem of performing end-to-end intermediate node link packet loss measurement.

In order to solve the above problems, the present invention provides a method for measuring link packet loss, including:

The target node receives the packet loss calculation information LMM message sent by the initiator node, and the LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested;

The target node judges whether it is the node to be tested according to the positioning information;

If it is the node to be tested, count the number of received messages sent by the initiator node;

The target node obtains link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node.

In an embodiment of the present invention, the positioning information of the node to be tested includes: the location information of the node to be tested or the relative position information of the node to be tested relative to the initiator node; the target node according to The positioning information judging whether itself is the node to be tested includes:

The target node judges whether its own location information is the same as the location information of the node to be tested, if the same, it is the node to be tested; if different, it is not the node to be tested;

or

The target node judges whether its relative position information relative to the initiator node is the same as the relative position information of the node to be tested, if the same, it is the node to be tested; if not, it is not the node to be tested node.

In an embodiment of the present invention, when the link is an MPLS-TP network link, the relative position information of the node to be tested relative to the initiator node includes: the node to be tested and the initiator node The lifetime value in the different tunnel label of the end node or the lifetime value in the pseudowire label;

When the link is a CFM network link, the location information of the node to be tested may be a MAC address of the node to be tested.

In an embodiment of the present invention, it further includes that the target node judges that it is not the node to be tested according to the positioning information, and then directly forwards the LMM message to the next-hop node.

In an embodiment of the present invention, the method of calculating link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node includes :

The target node itself calculates the packet loss of the link message through the received number of packets sent by the initiator node and the number of packets sent by the initiator node;

or

The target node sends the received number of packets sent by the initiator node and the number of packets sent by the initiator node to the initiator node through a packet loss response information LMR message, so that the The initiating end node calculates the link packet loss according to the above parameters.

In an embodiment of the present invention, at the target node, according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node, the link packet loss Afterwards, it also includes: the target node sends a packet loss response information LMR message to the initiator node, and the LMR message includes the number of messages sent by the target node to the initiator node, so that the The initiating node obtains the link report according to the number of messages sent by the target node to the initiating node and the number of messages received by the initiating node from the target node to the initiating node Packet loss.

In order to solve the above problems, the present invention also provides a method for measuring link packet loss, including:

The initiator node sends a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested, so that the target node The number of packets sent by the end node and the number of packets received by the target node from the initiating end node to the target node are obtained to obtain link packet loss.

In order to solve the above problems, the present invention also provides a method for measuring link packet loss, including:

The initiator node sends a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested;

The target node receives the packet loss calculation information LMM message sent by the initiator node, and judges whether it is the node to be tested according to the positioning information; if it is the node to be tested, then counts the received initiator The number of messages sent by the node;

The target node obtains link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node.

In order to solve the above problems, the present invention also provides a target node, including a receiving module, a judging module, a statistical module and a computing module:

The receiving module is used to receive the packet loss calculation information LMM message sent by the initiator node, and the LMM message includes the number of messages sent by the initiator node and the positioning information of the node to be tested;

The judging module is used to judge whether it is the node to be tested according to the positioning information;

The statistical module is used to count the number of received messages sent by the initiator node if it is the node to be tested;

The calculation module is configured to obtain link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node.

In an embodiment of the present invention, the positioning information of the node to be tested includes: the location information of the node to be tested or the relative position information of the node to be tested relative to the initiator node; the judging module includes Position judgment sub-module and relative position judgment sub-module:

The location judging submodule is used to judge whether its own location information is the same as the location information of the node to be tested. If it is the same, it is the node to be tested; if it is different, it is not the node to be tested;

or

The relative position judging submodule is used to judge whether the relative position information of itself relative to the initiator node is the same as the relative position information of the node to be tested, if the same, it is the node to be tested; if not, then Not the node under test.

In an embodiment of the present invention, when the link is an MPLS-TP network link, the relative position information of the node to be tested relative to the initiator node includes: the node to be tested and the initiator node The lifetime value in the different tunnel label of the end node or the lifetime value in the pseudowire label;

When the link is a CFM network link, the location information of the node to be tested may be a MAC address of the node to be tested.

In an embodiment of the present invention, a forwarding module is further included, and the forwarding module is configured to judge that it is not the node to be tested according to the positioning information, and then directly forward the LMM message to the next-hop node.

In an embodiment of the present invention, the calculation module is also used for:

calculating link packet loss by the number of received packets sent by the initiating node and the number of packets sent by the initiating node;

or

Sending the received number of packets sent by the initiator node and the number of packets sent by the initiator node to the initiator node through a packet loss response information LMR message, so that the initiator node Calculate link packet loss based on the above parameters.

In an embodiment of the present invention, a reply module is also included, and the reply module is used for receiving the number of messages sent by the initiator node and the number of messages sent by the initiator node in the calculation module. After the packet loss of the link packet is obtained by the number of messages, send a packet loss reply information LMR message to the initiator node, and the LMR message includes the number of messages sent by the target node to the initiator node , so that the initiator node receives the number of packets sent by the target node to the initiator node according to the number of packets sent by the target node to the initiator node Obtain link packet loss.

In order to solve the above problems, the present invention also provides an initiating node, including a sending module:

The sending module is used to send a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the positioning information of the node to be tested, so that the target node can be used according to The number of packets sent by the initiating node and the number of packets received by the target node from the initiating node to the target node are obtained to obtain link packet loss.

In order to solve the above problems, the present invention also provides a link packet loss measurement system, including an originating node and a target node:

The initiator node is used to send a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the positioning information of the node to be tested;

The target node is used to receive the packet loss calculation information LMM message sent by the initiator node, and judge whether it is the node to be tested according to the positioning information; if it is the node to be tested, then count the received nodes. The number of packets sent by the originating end node;

The target node is further configured to obtain link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node.

The beneficial effects of the present invention are:

The link message packet loss measurement method and system provided by the present invention, the target node, and the initiator node, the target node receives the packet loss calculation information LMM message sent by the initiator node, and the LMM message includes the number of messages sent by the initiator node number and the location information of the node to be tested; the target node judges whether it is the node to be tested according to the location information; if it is the node to be tested, it counts the The number of packets sent by the end node and the number of packets sent by the initiating end node can be used to obtain link packet loss. Compared with the existing technology, it has the positioning information of the node to be tested, and can locate the position of the intermediate node between the end and the end. After positioning, it can use the LMM message defined in various current OAM standards to perform link packet loss It is a supplement to the current standard, and it also provides a good method of link packet loss measurement for practical applications and engineering maintenance. means.

Description of drawings

FIG. 1 is a schematic flowchart of a method for measuring link packet loss provided by Embodiment 1 of the present invention;

FIG. 2-1 is a first schematic diagram of message flow in the link message packet loss measurement method provided by Embodiment 2 of the present invention;

FIG. 2-2 is a schematic flowchart of a method for measuring link packet loss provided by Embodiment 2 of the present invention;

2-3 is a second schematic diagram of message flow in the method for measuring link packet loss provided by Embodiment 2 of the present invention;

FIG. 3-1 is a schematic diagram of packet flow in the link packet loss measurement method provided by Embodiment 3 of the present invention;

FIG. 3-2 is a schematic flowchart of a method for measuring link packet loss provided by Embodiment 3 of the present invention;

FIG. 4 is a schematic diagram 1 of a target node structure provided by Embodiment 4 of the present invention;

FIG. 5 is a second schematic diagram of the target node structure provided by Embodiment 4 of the present invention;

FIG. 6 is a third schematic diagram of the target node structure provided by Embodiment 4 of the present invention;

FIG. 7 is a fourth structural schematic diagram of a target node provided by Embodiment 4 of the present invention;

FIG. 8 is a schematic structural diagram of an initiating node provided in Embodiment 4 of the present invention;

FIG. 9 is a schematic structural diagram of a link packet loss measurement system provided by Embodiment 4 of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment one

The method for measuring link packet loss in this embodiment, as shown in Figure 1, includes the following steps:

Step S101: the target node receives the packet loss calculation information LMM message sent by the initiator node, and the LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested;

In this step, the target node here should be understood as any node in the middle of the end-to-end. Of course, these nodes have the MIP configured and the LM function enabled. Of course, the node is not measured, and MIP may not be configured. The originating end here refers to two head ends on a link for sending information for information exchange. Moreover, the target node may also be an end node. The number of packets sent by the initiator node here refers to how many packets the initiator node sends to the next-hop node, and the specific packets may be data packets and client layer packets. It should be understood that the initiator will continuously send various messages to the next hop node, and the packet loss calculation information LMM message is to tell the next hop node how many messages have been sent; The number and rate of messages are different. Preferably, in order to facilitate statistical calculations, or to know the specific packet loss situation corresponding to a certain type of service according to user needs, the corresponding number of messages sent at the same level is selected. For example, the packet number is X1.

Step S102: The target node judges whether it is a node to be tested according to the positioning information;

In this step, it should be understood that in an end-to-end link, each node has its corresponding node location information, which can be its corresponding address information or the number of nodes in the link. Nodes, for example, there are four nodes in an end-to-end link, the initiator is the head-end node, and the corresponding addresses are 132.132.45.16, 132.132.45.26, 132.132.45.36, and 132.132.45.46; the corresponding number can also be the initiator node PE1 , the intermediate node P1, the intermediate node P2 and the receiving end node PE2. The location information is the specific node for which link packet loss measurement is to be performed, for example, the location information may be 132.132.45.26 or P1.

Step S103: If it is the node to be tested, count the number of received messages sent by the initiator node;

In this step, since different services correspond to different numbers and rates of sent packets, it is preferred to choose to count the number of packets sent corresponding to the same level. For example, the number of packets is X2.

Step S104: The target node obtains link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node.

In this step, specifically, the target node can calculate the packet loss of the link by itself, that is, calculate the link packet loss based on the number of received packets sent by the initiator node and the number of packets sent by the initiator node. Link packet loss, combined with the above example, the link packet loss is: X1-X2. Further, in order to facilitate management, the calculation is performed by the same initiator node, so as to manage the packet loss of the used node, and the target node can also receive the number of packets sent by the initiator node and the number of packets sent by the initiator node. The number of messages is sent to the initiating end node through the packet loss reply information LMR message, so that the initiating end node can calculate the packet loss of the link message according to the above parameters.

It is worth noting that, further, the receiving time can also be recorded, for example, the target node records that X1 messages have been received, and the time of receiving these messages is T1, so that the link packet loss rate can be calculated, that is, the link loss rate Packet rate: (X1－X2)/T1.

Specifically, the positioning information of the node to be tested in the above step S102 may be the position information of the node to be tested or the relative position information of the node to be tested relative to the initiator node; in the above step S103, the target node judges whether it is The test node includes: the target node judges whether its own position information is the same as the position information of the node to be tested. If it is the same, it is the node to be tested; if it is different, it is not the node to be tested; Whether the location information is the same as the relative location information of the nodes to be tested. If they are the same, they are the nodes to be tested; if not, they are not the nodes to be tested. Combined with the above example to illustrate, the node to be tested is P2, then the location information can be the location information of P2 132.132.45.26, or the location information of P2 relative to PE1, that is, the number of nodes after PE1, that is, the location information It is the second node after PE1. Then the target node judges whether its own address is 132.132.45.26, if it is, it means that it is the node to be tested, or judges whether it is the second node after the initiator node PE1, if it is the second node, it is the node to be tested node. It should be understood that other ways to locate which node to measure should be included.

Preferably, it can be improved based on the existing protocol. When the link is an MPLS-TP network link, the relative position information of the node to be tested relative to the initiator node includes: the tunnel label difference between the node to be tested and the initiator node The life cycle value TTL or the life cycle value TTL in the pseudowire label, that is, TTL is the abbreviation of Time To Live (life cycle value), and this field specifies the maximum number of hops that the IP packet can be forwarded in the computer network. When the link is a CFM network link, the location information of the node to be tested may be the MAC address of the node to be tested.

Further, it also includes that the target node judges that it is not the node to be tested according to the positioning information, and then directly forwards the LMM message to the next-hop node.

Further, after the target node obtains the packet loss of the link according to the received number of packets sent by the initiator node and the number of packets sent by the initiator node, it also includes: the target node sends the packet loss to the initiator node Reply information LMR message, the LMR message includes the number of messages sent by the target node to the initiator node, so that the initiator node sends the number of messages to the initiator node according to the number of messages sent by the target node and the number of messages received by the initiator node from the target node. The number of packets sent to the initiating end node is obtained by link packet loss. That is, not only the packet loss of the link from the initiator node to the node under test can be measured, but also the packet loss of the link from the node under test to the initiator node can be measured.

It should be noted that in the above step S101, it should be understood that the initiator node will send a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the location of the node to be tested Information, so that the target node obtains link packet loss according to the number of packets sent by the initiator node and the number of packets received by the target node from the initiator node to the target node.

Embodiment two

The link packet loss measurement method of this embodiment is mainly used to introduce the LM function of the tunnel layer in the TP-OAM protocol, as shown in Figure 2-1, which is a packet flow diagram in this method, for convenience Note that this article names the nodes of each node as PE1, P1, P2, and PE2. As shown in Figure 2-2, the link packet loss measurement method includes the following steps:

Step S201: configure the MEP node on the PE1 node, and enable the LM function, and the configured LM specifies the TTL to the destination MIP node;

In this step, configure MEP nodes on PE1 according to user requirements, enable the LM function at the tunnel layer, and configure basic information such as LM priority. After receiving the configuration command, the OAM protocol processing module of the PE1 node assembles the PDU of the LMM message according to the OAM protocol standard, and encapsulates the tunnel label and the Ethernet layer 2 header. As shown in Figure 2-1, the TTL value of the tunnel label of an LMM packet is 2, which means that the sent LM packet starts from PE1 and ends at P2. When the LM function is enabled, the OAM performance processing module of PE1 starts counting the number of service packets and client layer OAM packets passing through the node according to priority, that is, the number of packets sent/received by the local end. After the OAM performance processing module receives the LMM, it will mark the corresponding field in the message with the count of the message sent by the local end consistent with the priority of the LM message, and send it to the next hop node.

Step S202: For the intermediate point P1 node, the switch chip needs to subtract 1 from the TTL behind the packet tunnel label;

In this step, the intermediate node that is not the destination point can choose whether to configure the MIP node according to the configuration of the user. If the P1 node has configured the MIP and enabled the LM function, the OAM performance processing module of the P1 node will identify the received LMM message and determine whether the TTL value in its tunnel label is 1. As shown in Figure 2-1, the TTL of the LMM message received by the P1 node is 2, and the OAM performance processing module of the LMM message will be transparently transmitted to the switch chip directly. If the P1 node is not configured with MIP, the process of verifying the TTL value by the OAM performance processing module is omitted. At this time, no matter what the TTL value is, it is directly forwarded to the switching chip. The switch chip receives the LMM message whose TTL is equal to 2, reduces the TTL by 1, and forwards it to the next hop node in the original direction of the tunnel.

Step S203: The OAM performance processing module of the P2 node recognizes that TTL=1 and MIP is configured, then sends the LMM message to the OAM protocol processing module through the switching chip for processing;

In this step, after P2 configures the MIP node and enables the LM function, the OAM performance processing module of P2 starts to count the number of service packets and client layer OAM packets passing through the node according to priority, that is, the remote sending /Number of packets received. The OAM performance processing module of the P2 node identifies the received LMM message, and reads the TTL value in the tunnel label. As shown in Figure 2-1, the TTL value of the LMM packet is equal to 1. According to the priority information of the LMM message, the OAM performance processing module finds the received counter count with the same priority, and puts it in the reserved field of the LMM message, and finally forwards it to the switching chip. The switching chip of the P2 node reads the TTL value of the LMM message, and finally transfers the LMM message with a TTL of 1 to the OAM protocol processing module.

Step S204: The OAM protocol processing module of the P2 node receives the LMM message, and replies to the LMR message according to relevant standards;

In this step, after receiving the LMM message, the OAM protocol processing module of the P2 node encapsulates and replies a corresponding LMR message (TTL value is 255), and sends it through the switching chip. The OAM performance processing module of the P2 node receives the LMR message forwarded from the switch chip. Similar to the LMM, it needs to add a count consistent with the priority of the LMR message (that is, the number of messages sent by the remote end) in the LMR message.

Step S205: The PE1 node receives the LMR message, and the OAM performance processing module sends it to the OAM protocol processing module through the switching chip for processing;

In this step, the OAM performance processing module of the PE1 node receives the LMR message, and needs to mark the counter count with the same priority (that is, the number of messages received by the local end) in the reserved field, and extract the OAM protocol of the PE1 node through the switching chip The processing module performs the next step of processing. The OAM protocol processing module of the PE1 node receives the LMR message, reads the number of messages sent by the local end, the number of received messages from the remote end, the number of The number of texts is counted by four counters, and the number of near/far-end packet loss and near/far-end packet loss rate are calculated according to relevant standards.

Step S206: Read required performance statistics information on the PE1 node.

It is worth noting that for the multi-segment pseudowire scenario, as shown in Figure 2-3, this figure is the packet flow diagram, except that the TTL value of the LM packet is carried in the pseudowire label, and other implementation processes are the same as in this embodiment Very similar, this article will not repeat them. In addition, in this embodiment, the intermediate node of the destination point is the node to be tested, and the originating end node is the PE1 node.

Embodiment Three

The link packet loss measurement method of this embodiment is mainly used to introduce the LM function in Ethernet CFM, as shown in Figure 3-1, which is a packet flow diagram in this method. For the convenience of description, this article Name the rack MACs of the first three nodes as MAC0, MAC1, and MAC2, respectively. As shown in Figure 3-2, the link packet loss measurement method includes the following steps:

Step S301: configure the MEP node on the PE1 node, enable the LM function, and configure the destination MAC of the LM to be assigned to the destination MIP node;

In this step, configure the MEP node on PE1 according to the needs of the user, enable the LM to connect to the MIP node, specify the MAC (namely MAC2) to the MIP node, and configure basic information such as LM priority. After receiving the configuration command, the OAM protocol processing module of the PE1 node assembles the PDU and Ethernet layer 2 header of the LMM message according to the OAM protocol standard. As shown in Figure 3-1, the destination MAC address of the LMM packet is MAC2, which means that the sent LM packet starts from PE1 and ends at P2. When the LM function is enabled, the OAM performance processing module of PE1 starts counting the number of service packets and client layer OAM packets passing through the node according to priority, that is, the number of packets sent/received by the local end. After receiving the LMM, the OAM performance processing module stamps a count value consistent with the priority of the LMM message in the corresponding field in the LMM message, and sends it to the next-hop node.

Step S302: For the intermediate point, the switch chip needs to judge whether the DMAC of the LMM message is consistent with the MAC of the device, and if it is consistent, it will be extracted, otherwise, it will be forwarded;

In this step, the intermediate node that is not the destination point can choose whether to configure the MIP node according to the configuration of the user. If the P1 node is configured with MIP and the LM function is enabled, the OAM performance processing module of the P1 node identifies the received LMM message and judges whether its destination MAC is the rack MAC of the local machine. As shown in Figure 3-1, the DMAC of the P1 node receiving the LMM message is MAC2, which is not the rack MAC of the local end. The OAM performance processing module of the LMM message will be transparently transmitted to the switch chip directly. If P1 is not configured with a MIP node, the process of verifying the destination MAC by the OAM performance processing module is omitted. At this time, no matter what the destination MAC value of the LMM is, it is directly forwarded to the switching chip. When the switch chip receives the LMM message whose DMAC is not equal to the MAC of the local frame, it will forward it to the next hop node by broadcasting in the VLAN domain.

Step S303: The OAM performance processing module of the P2 node recognizes that the DMAC will be consistent with the MAC of the device and that the MIP is configured, and then sends the LMM message to the OAM protocol processing module through the switching chip for processing;

In this step, after P2 configures the MIP node and enables the LM function, the OAM performance processing module of P2 starts to count the number of service packets and client layer OAM packets passing through the node according to priority, that is, the remote sending /Number of packets received. The OAM performance processing module of the P2 node identifies the received LMM message, and reads the destination MAC of the message. As shown in Figure 3-1, the destination MAC address of the LMM packet is equal to the rack MAC address of the P2 node. The OAM performance processing module marks the count consistent with the message priority in the reserved field of the LMM message (that is, the number of received messages at the far end) (this processing can also put the count value in the message cookie for transmission), and finally forwards to Exchange chips. The switching chip of the P2 node reads the destination MAC of the LMM message, and finally forwards the LMM message whose destination MAC is equal to MAC2 to the OAM protocol processing module.

Step S304: The OAM protocol processing module of the P2 node receives the LMM message, and replies to the LMR message according to relevant standards;

In this step, after receiving the LMM message, the OAM protocol processing module of the P2 node assembles and replies a corresponding LMR message, and sends it to the switching chip. The destination MAC address of the returned LMR message is equal to the SMAC of the LMM message. As shown in Figure 3-1, the DMAC of the LMR message is equal to MAC0. The OAM performance processing module of the P2 node receives the LMR message forwarded from the switch chip, similar to the LMM, and also marks the count consistent with the priority of the LMR message in the corresponding field of the LMR (that is, the number of messages sent by the remote end).

Step S305: The PE1 node receives the LMR message, and the OAM performance processing module sends it to the OAM protocol processing module through the switching chip for processing;

In this step, when the PE1 node OAM performance processing module receives the LMR message, it needs to mark the local received message count in the reserved field of the message and extract the message to the OAM protocol processing module through the switching chip for further processing. The OAM protocol processing module of the PE1 node receives the LMR message, reads the number of messages sent by the local end, the number of received messages from the remote end, the number of The number of texts is counted by four counters, and the number of near/far-end packet loss and near/far-end packet loss rate are calculated according to relevant standards.

Step S306: Read required performance statistics information on the PE1 node.

Embodiment Four

This embodiment provides a target node 400, as shown in Figure 4, including a receiving module 401, a judging module 402, a statistical module 403, and a calculating module 404: the receiving module 401 is used to receive the packet loss calculation information LMM report sent by the initiator node The LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested; the judging module 402 is used to judge whether it is a node to be tested according to the location information; the statistics module 403 is used to if it is a node to be tested, Then count the number of packets sent by the initiator node received; the calculation module 404 is used to obtain the link message loss according to the number of packets sent by the initiator node received and the number of packets sent by the initiator node Bag.

This embodiment also provides a target node 400. As shown in FIG. 5 , the judging module 402 includes a position judging submodule 4021 and a relative position judging submodule 4022: the location information of the node to be tested includes: the location information of the node to be tested or The relative position information of the measured node relative to the initiator node; the position judgment submodule 4021 is used to judge whether the position information of itself is the same as the position information of the node to be tested, if the same, it is the node to be tested; if it is different, it is not the node to be tested ; or the relative position judgment sub-module 4022 is used to judge whether the relative position information of the node to be tested relative to the initiator node is adjacent, if it is adjacent, it is the node to be tested; if it is not adjacent, it is not the node to be tested.

Specifically, when the link is an MPLS-TP network link, the relative position information of the node to be tested relative to the initiating node includes: the lifetime value in the tunnel label or the value in the pseudowire label that differs between the node to be tested and the initiating node A lifetime value; when the link is a CFM network link, the location information of the node to be tested may be the MAC address of the node to be tested.

This embodiment also provides a target node 400. As shown in FIG. 6, it also includes a forwarding module 405. The forwarding module 405 is used to judge that it is not the node to be tested according to the positioning information, and then directly forward the LMM message to the next hop node. .

Further, the calculation module 404 is also used to: calculate the packet loss of the link according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node; The number of packets sent and the number of packets sent by the initiating node are sent to the initiating node through the packet loss response information LMR message, so that the initiating node calculates the packet loss of the link according to the above parameters.

This embodiment also provides a target node 400. As shown in FIG. 7 , it also includes a reply module 406. The reply module 406 is used in the calculation module 404 according to the number of messages sent by the initiator node received and the number of messages sent by the initiator node. After the packet loss of the link packet is obtained by the number of sent packets, send a packet loss response information LMR packet to the initiator node, and the LMR packet includes the number of packets that the target node 400 sends to the initiator node, so that the initiator The node obtains link packet loss according to the number of packets sent by the target node 400 to the initiator node and the number of packets received by the initiator node from the target node 400 to the initiator node.

This embodiment also provides an initiator node 500, as shown in FIG. 8 , including a sending module 501: the sending module 501 is used to send a packet loss calculation information LMM message to the target node 400, and the LMM message includes the information sent by the initiator node. The number of messages and the positioning information of the node to be tested, so that the target node 400 obtains the link according to the number of messages sent by the initiator node and the number of messages sent by the target node 400 to the target node 400 received by the initiator node. Packets are lost.

This embodiment also provides a system for measuring link packet loss, as shown in FIG. 9 , including an initiator node 500 and a target node 400:

The initiator node 500 is used to send the packet loss calculation information LMM message to the target node 400, and the LMM message includes the number of messages sent by the initiator node 500 and the location information of the node to be tested; the target node 400 is used to receive the information of the initiator node The packet loss calculation information LMM message sent by 500 judges whether itself is the node to be tested according to the positioning information; if it is the node to be tested, then count the number of messages sent by the initiator node 500 received; the target node 400 is also used for Link packet loss is obtained according to the received number of packets sent by the initiating node 500 and the number of packets sent by the initiating node 500 .

Those skilled in the art can understand that all or part of the steps in the above method can be completed by instructing related hardware through a program, and the above program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk, and the like. Optionally, all or part of the steps in the foregoing embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiments may be implemented in the form of hardware, or may be implemented in the form of software function modules. The present invention is not limited to any specific combination of hardware and software.

The above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them, and the present invention is described in detail with reference to preferred embodiments. Those skilled in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all should be covered by the claims of the present invention.

Claims (16)

1. A method for measuring link packet loss, characterized in that, comprising: The target node receives the packet loss calculation information LMM message sent by the initiator node, and the LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested; The target node judges whether it is the node to be tested according to the positioning information; If it is the node to be tested, count the number of received messages sent by the initiator node; The target node obtains link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node. 2. The method for measuring link packet loss according to claim 1, wherein the location information of the node to be tested comprises: the position information of the node to be tested or the node to be tested relative to the initiator The relative position information of terminal node; Described target node judges whether oneself is described node under test according to described positioning information and comprises: The target node judges whether its own location information is the same as the location information of the node to be tested, if the same, it is the node to be tested; if different, it is not the node to be tested; or The target node judges whether its relative position information relative to the initiator node is the same as the relative position information of the node to be tested, if the same, it is the node to be tested; if not, it is not the node to be tested node. 3. link packet loss measurement method as claimed in claim 2, is characterized in that, When the link is an MPLS-TP network link, the relative position information of the node to be tested relative to the initiating node includes: the lifetime of the tunnel label difference between the node to be tested and the initiating node value or the lifetime value in the pseudowire tag; When the link is a CFM network link, the location information of the node to be tested may be a MAC address of the node to be tested. 4. The method for measuring link packet loss as claimed in claim 1, further comprising that the target node judges that itself is not the node to be tested according to the positioning information, and then directly sends the LMM message forwarded to the next hop node. 5. The method for measuring link packet loss according to claim 1-4, wherein the number of packets sent by the initiator node and the number of packets sent by the initiator node received are characterized in that: The methods for calculating the packet loss of link packets by the number of packets include: The target node itself calculates the packet loss of the link message through the received number of packets sent by the initiator node and the number of packets sent by the initiator node; or The target node sends the received number of packets sent by the initiator node and the number of packets sent by the initiator node to the initiator node through a packet loss response information LMR message, so that the The initiating end node calculates the link packet loss according to the above parameters. 6. The method for measuring link packet loss as claimed in claim 1-4, wherein, at the target node, according to the number of packets sent by the initiator node received and the initiator node After the number of messages sent by the node is obtained after the packet loss of the link message, it also includes: the target node sends a packet loss response information LMR message to the initiator node, and the LMR message includes the message sent by the target node to The number of messages of the initiator node, so that the initiator node sends the number of messages sent to the initiator node by the target node and the number of messages sent by the target node to the initiator node. The number of packets of the initiating end node is obtained by link packet loss. 7. A method for measuring link packet loss, characterized in that, comprising: The initiator node sends a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested, so that the target node The number of packets sent by the end node and the number of packets received by the target node from the initiating end node to the target node are obtained to obtain link packet loss. 8. A method for measuring link packet loss, characterized in that, comprising: The initiator node sends a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the location information of the node to be tested; The target node receives the packet loss calculation information LMM message sent by the initiator node, and judges whether it is the node to be tested according to the positioning information; if it is the node to be tested, then counts the received initiator The number of messages sent by the node; The target node obtains link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node. 9. A target node, characterized in that it includes a receiving module, a judging module, a statistical module and a computing module: The receiving module is used to receive the packet loss calculation information LMM message sent by the initiator node, and the LMM message includes the number of messages sent by the initiator node and the positioning information of the node to be tested; The judging module is used to judge whether it is the node to be tested according to the positioning information; The statistical module is used to count the number of received messages sent by the initiator node if it is the node to be tested; The calculation module is configured to obtain link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node. 10. The target node according to claim 9, wherein the positioning information of the node to be tested comprises: the position information of the node to be tested or the relative position information of the node to be tested relative to the initiator node ; The judgment module includes a position judgment submodule and a relative position judgment submodule: The location judging submodule is used to judge whether its own location information is the same as the location information of the node to be tested. If it is the same, it is the node to be tested; if it is different, it is not the node to be tested; or The relative position judging submodule is used to judge whether the relative position information of itself relative to the initiator node is the same as the relative position information of the node to be tested, if the same, it is the node to be tested; if not, then Not the node under test. 11. The target node of claim 10, wherein When the link is an MPLS-TP network link, the relative position information of the node to be tested relative to the initiating node includes: the lifetime of the tunnel label difference between the node to be tested and the initiating node value or the lifetime value in the pseudowire tag; When the link is a CFM network link, the location information of the node to be tested may be a MAC address of the node to be tested. 12. The target node according to claim 9, further comprising a forwarding module, the forwarding module is used to judge that it is not the node to be tested according to the positioning information, and then directly forwards the LMM message to the next hop node. 13. The target node according to claim 9-12, wherein the calculation module is further used for: calculating link packet loss by the number of received packets sent by the initiating node and the number of packets sent by the initiating node; or Sending the received number of packets sent by the initiator node and the number of packets sent by the initiator node to the initiator node through a packet loss response information LMR message, so that the initiator node Calculate link packet loss based on the above parameters. 14. The target node according to claim 9-12, further comprising a reply module, the reply module is used to send the message number, And after the packet loss of the link packet is obtained from the number of packets sent by the initiator node, send a packet loss reply information LMR message to the initiator node, and the LMR message includes the message sent by the target node to the the number of packets of the initiator node, so that the initiator node sends the number of packets sent to the initiator node by the target node and the number of packets received by the initiator node from the target node to the The number of packets of the initiating end node is obtained by link packet loss. 15. An initiating node, comprising a sending module: The sending module is used to send a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the positioning information of the node to be tested, so that the target node can be used according to The number of packets sent by the initiating node and the number of packets received by the target node from the initiating node to the target node are obtained to obtain link packet loss. 16. A link packet loss measurement system, characterized in that it includes an originating end node and a target node: The initiator node is used to send a packet loss calculation information LMM message to the target node, and the LMM message includes the number of messages sent by the initiator node and the positioning information of the node to be tested; The target node is used to receive the packet loss calculation information LMM message sent by the initiator node, and judge whether it is the node to be tested according to the positioning information; if it is the node to be tested, then count the received nodes. The number of packets sent by the originating end node; The target node is further configured to obtain link packet loss according to the received number of packets sent by the initiating node and the number of packets sent by the initiating node.