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Multihoming access-based loop avoidance method and edge devices

An edge device and multi-homing technology, applied in the field of network communication, can solve problems such as broadcast storms, and achieve the effect of optimizing the layer 2 loop

Active Publication Date: 2012-02-01
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this only applies if the site is accessed through an edge device
When a site accesses the network through multi-homing, even if the split horizon technology is enabled on the edge device of the site, a large loop may be formed between Layer 2 networks of remote sites, as follows: image 3 The loop shown (in the image 3 indicated by a thick line in ), which causes a broadcast storm

Method used

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  • Multihoming access-based loop avoidance method and edge devices
  • Multihoming access-based loop avoidance method and edge devices
  • Multihoming access-based loop avoidance method and edge devices

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] see Figure 4 , Figure 4 The flow chart of the method provided by the embodiment of the present invention. This method is applied to scenarios involving more than two virtual private network (VPN) sites. Wherein, the VPN site is aimed at the user side, and includes at least two edge devices. The so-called edge device is used to forward the traffic of the forwarding instance to the public network, and terminate the traffic of the forwarding instance entering the VPN site from the public network. In order to avoid loops, the present invention needs to authorize the forwarding instance for the edge device, ensure that the edge device only forwards the traffic of its authorized forwarding instance to the public network, and terminate the tr...

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Abstract

The invention provides a multihoming access-based loop avoidance method and edge devices. The method comprises the following steps which are executed by each edge device: A, exchanging with other edge devices of the same VPN (Virtual Private Network) site to select a main device; B, authorizing forwarding examples for all edge device in the same VPN site when the edge device is used as the main device, and acquiring the authorized forwarding examples from the selected main device when the edge device is not used as the main device; and C, allowing the flow rate of the authorized forwarding examples to enter and exit a public network, and preventing the flow rate of the unauthorized forwarding examples from entering and exiting the public network.

Description

technical field [0001] The invention relates to network communication technology, in particular to a loop avoidance method and edge equipment based on multi-homing access. Background technique [0002] In order to ensure high reliability and realize load sharing, currently, sites are usually connected to the operator's network through multi-homing. figure 1 It shows a schematic diagram of a station accessing an operator's network through dual-homing. exist figure 1 There are two sites in the network, namely site 1 and site 2. Site 1 and site 2 are respectively connected to the operator's network through two edge devices (EDs) to realize interconnection. [0003] To facilitate communication between sites, point-to-point tunnels are established between edge devices between sites, and the point-to-point tunnels can support VPLS, GRE, TRILL, MacInMac, etc. Such as figure 1 As shown, the edge devices ED1 and ED2 at site 1, and the edge devices ED3 and ED4 at site 2 have estab...

Claims

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Application Information

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IPC IPC(8): H04L12/46H04L12/56H04L12/24H04L45/18
CPCH04L12/46H04L63/0272H04L12/24H04L12/4633H04L12/56H04L45/18H04L47/70H04L47/10H04L45/04H04L12/4641H04L45/48
Inventor 周万
Owner NEW H3C TECH CO LTD
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