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Implementation method and system for Ethernet topology discovery

A technology of topology discovery and implementation method, applied in the field of Ethernet topology discovery implementation method and system, capable of solving problems such as blocked ports and incomplete physical topology

Inactive Publication Date: 2014-04-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned Ethernet networking, because one or some ports in the network are usually blocked, the transmission path of the traffic is not completely consistent with the physical topology of the network, and with the protection switching, the transmission path of the traffic will also occur. Therefore, in actual operation, in order to be able to intuitively and conveniently discover information such as node locations, node numbers, topology status, whether the path is reachable, and whether the protection protocol is running normally in the overall network, it is necessary to be able to detect changes in the Ethernet topology in time and However, there is currently no implementation that can be applied to Ethernet topology discovery

Method used

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  • Implementation method and system for Ethernet topology discovery
  • Implementation method and system for Ethernet topology discovery
  • Implementation method and system for Ethernet topology discovery

Examples

Experimental program
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example 1

[0088] Example 1: with figure 1 The shown topology is taken as an example, and the node sends and forwards the instance of DiscFrame by applying the topology discovery solution of the present invention.

[0089] Figure 4 Shown is a schematic diagram of node sending and forwarding DiscFrame in the embodiment of the present invention, with figure 1 The topology shown as an example, Figure 4 The life cycle process of the DiscFrame sent by S1 and S3 being forwarded in the protection domain is drawn in the figure. And in the following implementation manners, the process of calculating the network topology is described by taking S1 as an example.

[0090] S1 sends DiscFrame FS11 and FS12 to its own ports 11 and 12 respectively at time t0, and FS11 returns to S1 at time t8 after being forwarded by S4-S3-S2. FS12 is forwarded by S2-S3-S4, and returns to S1 at time t10.

[0091] S3 sends DiscFrame FS31 and FS32 to its own ports 31 and 32 respectively at time t2, FS31 arrives at ...

example 2

[0099] Example two: figure 1 topology cut to figure 2 Example of post-topology collection.

[0100] by Figure 5 For example, when figure 1 When the link between S2 and S3 fails, according to the protection switching method of G8032, the port 22 of S2 and the port 31 of S3 are blocked, and the node S1 opens the blocked port 11 (the state is switched to Forwarding), and the network topology is as follows figure 2 shown.

[0101] Assuming that S1 receives the FS32 message sent by S3 at this time, S1 extracts the NodeList in the message, and obtains the topology chain on port 11 as "S1(11F)-(42F)S4(41F)-(32F)S3(31B) ", after comparing with "S1(11B)-(42F)S4(41F)-(32F)S3(31F)-(22F)S2(21F)-(12F)S1"" on port 11 in the topology information table, it is found The topology relationship contained in the former is a subset of the latter topology relationship, but the state of port 11 of node S1 in the intersection part is different or the state of port 31 of S3 is different, then c...

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Abstract

The invention discloses an implementation method for Ethernet topology discovery, comprising the following steps: a topology management domain is set; any node in the topology management domain transmits a topology discovery frame (DiscFrame) comprising self node information; and the node receiving the DiscFrame in the topology management domain is used for operating the node information in the DiscFrame by combining with a topology information table so as to obtain topology information of the topology management domain. The invention further discloses an implementation system for Ethernet topology discovery, comprising a transmitting unit and an operating unit, wherein the transmitting unit is used for leading any node in the topology management domain to transmit the DiscFrame of the self node information; and the operating unit is used for leading the nodes receiving the DiscFrame in the topology management domain to carry out operation on the node information in the DiscFrame by combining with the topology information table. Due to adoption of the method and the system, the scheme applied in Ethernet topology discovery is realized.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a method and system for realizing Ethernet topology discovery. Background technique [0002] With the development of the Ethernet network in the direction of multi-service bearing, especially some services have higher and higher requirements on the reliability and real-time performance of the network, the Ethernet widely adopts redundant networking to improve network reliability. And in the redundant networking of the Ethernet, it usually requires fast protection switching, reaching less than 50 ms. Currently, such fast protection switching technologies include RFC3619 of the Internet Engineering Task Force (IETF, Internet Engineering Task Force), G.8032 of the International Telecommunication Union (ITU-T, International Telecommunication Union), and the like. [0003] For example, in the G.8032 standard proposed by ITU-T, an automatic protection switching protocol and mechanism...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04L12/24H04L12/28
Inventor 魏月华
Owner ZTE CORP
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