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Route publishing method and device

A routing and router technology, applied in the field of communication, can solve problems such as greatly affecting network performance

Active Publication Date: 2016-02-17
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when multiple IBGP connections are established between the BGP router and the RR router, there will be redundant BGP sessions between the BGP router and the RR router. The redundant sessions will cause the RR router to advertise to other BGP routers in the AS. The amount of routing will increase greatly with the increase of topology (each topology must publish a copy), which has a great impact on network performance

Method used

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Embodiment Construction

[0056] In the prior art, when the traffic in the AS is centrally controlled and scheduled through the RR route reflector (hereinafter referred to as the RR router), it is usually possible to configure multi-topology on the target BGP router in the AS, and between the target BGP router and the RR Multiple IGBP connections are established between routers, and the RR router establishes a neighbor relationship with the target BGP router through the multiple IGBP connections, and then advertises routes for each topology.

[0057] However, in the above solution, since there are multiple IGBP connections between the target BGP router and the RR router, the RR router needs to establish a neighbor relationship with the target BGP router multiple times, that is, there will be a multi-node connection between the RR router and the target BGP router. neighbor relationship. Moreover, when the RR router advertises routes for each topology in the target BGP router and specifies forwarding nex...

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Abstract

The invention proposes a route publishing method, and the method comprises the steps: enabling all BGP routers to report updated routes to a BGP route reflector; enabling the BGP route reflector to publish an RT label with a VRF and a plurality of next-hop target routes to a far-end target BGP router with a VRF according to the collected updated routes, wherein each next-hop target route is configured to have a different NT label; enabling the target BGP router to receive the target routes reflected by the BGP route reflector; enabling the target routes to be installed in a corresponding VRF route list according to the RT label, and transmitting a message to the next hop, matched with the RT label of the message transmitting VRF, of the NT label when the received message is matched with the target route. The method can flexibly select a next hop for each VRF, and achieves the centralized control and dispatching of flow.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method and device for issuing routes. Background technique [0002] The BGP (Border Gateway Protocol, Border Gateway Protocol) protocol is a dynamic routing protocol that can be used not only between different ASs (Autonomous Systems, autonomous systems), but also within the same AS. When BGP runs inside the same AS, it is called IBGP (Interior Border Gateway Protocol, internal BGP protocol); when BGP runs between different ASs, it is called EBGP (External Border Gateway Protocol, external BGP protocol). Among them, the AS can be a group of routers that have the same routing strategy and belong to the same technical management department. [0003] In order to prevent routing loops, the BGP protocol stipulates that routes received from IBGP neighbors cannot be advertised to IBGP. Therefore, when advertising routes in an AS, it is necessary to establish an IBGP con...

Claims

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Application Information

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IPC IPC(8): H04L12/751H04L45/02H04L45/74
CPCH04L45/033H04L45/02
Inventor 章海锋
Owner NEW H3C TECH CO LTD
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