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Method and device for realizing user access multi-homing network and network equipment

A technology for network implementation and access equipment, applied in the field of network communication, can solve problems such as loop problems that cannot be solved well, and achieve the effect of protecting existing network equipment investment, simple function requirements, and low requirements

Active Publication Date: 2009-12-30
BEIJING ZHIGU TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] It can be seen that, when using different routing switching protocols for the 3 or 4 access links of the CE multi-homing network, the methods provided above cannot solve the loop problem caused by this kind of networking.

Method used

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  • Method and device for realizing user access multi-homing network and network equipment
  • Method and device for realizing user access multi-homing network and network equipment
  • Method and device for realizing user access multi-homing network and network equipment

Examples

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Embodiment Construction

[0043] The core of this solution is: each PE in the home will determine the VPN routing information that needs to be sent to the CE in the home, and reflect it to the peer PE in the home (if there are two, it will be reflected to the PE at the opposite end, if there are more than one, it will be reflected to other PEs in the home) PE); when each PE in the home place receives the VPN route sent by the home CE, if it is determined that its VPN route has been included in the VPN route information sent by the home peer PE, it is forbidden to update the VPN routing table from the VPN route information received by the home CE item.

[0044] Based on the core idea of ​​this solution, the following takes two PEs as an example to make a further introduction.

[0045] Firstly, a loop route reflector mechanism is introduced to be different from the BGP route reflector reflection route in the prior art. The so-called loop route reflector refers to the BGP route reflector client where eac...

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Abstract

The invention discloses a method and a device for realizing a user access multi-homing network and network equipment, and solves the problem of dynamic routing loops generated when a user access network uses CE multi-homing networking. The method disclosed by the invention comprises that: a home location PE receives VPN routing information from other PE; if judging that the VPN routing information received from the other PE is required to be sent to homing CE, the home location PE reflects the VPN routing information to the other PE on the home location; and when receiving the VPN routing information from the homing CE, the home location PE judges whether the VPN routing information received from the homing CE is the same as the reflected VPN routing information, and if so, VPN routing entries are prohibited from being updated by the VPN routing information received from the homing CE. Because the home location PE filters routing which is received from the CE and possibly causes loops by utilizing the reflected VPN routing information, and the VPN routing information is not used to update the VPN routing entries, so the problem of the dynamic routing loops is solved.

Description

technical field [0001] The invention belongs to the field of network communication, and in particular relates to a method, device and network equipment for realizing user access to a multi-homing network. Background technique [0002] MPLS VPN is an IP VPN (Virtual Private Network, virtual private network) based on MPLS (Multiprotocol Label Switching) technology. The wider the application extension. In MPLSVPN, there are CE (Custom Edge, user access equipment), PE (Provider Edge Router, provider edge router) and P (Provider Router, provider core router) three network devices. IPv4-based VPN routing information is completed through routing exchange between PEs and between CEs and PEs: PEs and CEs can exchange routing information through static or dynamic routing protocols: PEs maintain VPN private network routing table VRF( VPN Routing / Forwarding Instance, route forwarding instance), and attach attributes such as RD (Route Distinguisher, route distinguisher) and RT (Route T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L29/06H04L45/50H04W8/02
Inventor 陈佑建
Owner BEIJING ZHIGU TECH SERVICE
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