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Method for avoiding loop circuit in virtual layer 2 network

A virtual layer 2 and network technology, applied in the field of virtual layer 2 network, can solve problems such as potential safety hazards, and achieve the effect of avoiding loops and expanding the use of networking

Active Publication Date: 2011-08-03
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to avoid the formation of loops, dual-stack networking is currently limited to networking with only one central dual-stack device, and this networking method itself has great security risks

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  • Method for avoiding loop circuit in virtual layer 2 network
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  • Method for avoiding loop circuit in virtual layer 2 network

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Embodiment Construction

[0040]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0041] The main idea of ​​the present invention is: by enabling MSTP in the VSI instance of the network device of the virtual two-layer network, and binding the VSI instance with an MSTP instance, thereby, the MSTP instance can send bridging protocol data in the virtual two-layer network Unit (BPDU, Bridge Protocol Data Unit) message to perform loop detection, and trim redundant connections to remove loops, thereby expanding the networking application of VPLS / PBB.

[0042] In the present invention, the VSI instance includes a VPLS instance and a PBB instance. Taking VPLS layered networking and VPLS / PBB dual-stack networking as examples, the situation of dual-homing of CE inside VPLS is similar to that of VPLS layering, and layered VPLS is used as An exam...

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Abstract

The invention provides a method for avoiding a loop circuit in a virtual layer 2 network, which comprises the following steps of: enabling a multiple spanning tree protocol (MSTP) in a virtual switch instance (VSI) of network equipment of the virtual layer 2 network, and binding the VSI with an MSTP instance; and transmitting a bridge protocol data unit (BPDU) message for loop circuit detection by using the MSTP instance. By the method, redundant connection can be pruned in the virtual layer 2 network, and the loop circuit is removed.

Description

technical field [0001] The invention relates to a virtual two-layer network technology, in particular to a method for avoiding loops in a virtual two-layer network. Background technique [0002] STP (Spanning Tree Protocol, Spanning Tree Protocol) is established according to the 802.1D standard formulated by the IEEE Association, and is a protocol for eliminating physical loops at the data link layer in a local area network. Devices running this protocol discover loops in the network by exchanging information with each other, and selectively block certain ports, and finally prune the loop network structure into a loop-free tree network structure, thereby preventing packets from being transmitted in the loop. Continuous growth and infinite loop in the road network, to avoid the problem of packet processing capability degradation caused by repeated reception of the same message by the device. [0003] MSTP (Multiple Spanning Tree Protocol, Multiple Spanning Tree Protocol) is ...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/46H04L12/56
Inventor 宋小恒郑国良彭剑远
Owner NEW H3C TECH CO LTD