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Routing method and device for traversing autonomous systems

An autonomous system and routing technology, applied in the field of network communication, can solve the problems of routing black hole and discard, and achieve the effect of avoiding routing black hole

Active Publication Date: 2019-01-22
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, when a packet passes through the AS, because the destination address of the packet is the address of another AS, the router that only runs IGP may discard the packet because the destination address of the packet is unreachable, forming a routing black hole.

Method used

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  • Routing method and device for traversing autonomous systems
  • Routing method and device for traversing autonomous systems
  • Routing method and device for traversing autonomous systems

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Embodiment Construction

[0027] BGP (Border Gateway Protocol, Border Gateway Protocol) is a dynamic EGP protocol that can be used not only between different ASs, but also within the same AS. When BGP runs inside the same AS, it is called IBGP (Internal BGP, Internal Border Gateway Protocol); when BGP runs between different ASs, it is called EBGP (External BGP, External Border Gateway Protocol). Because of its stability and the ability to handle a large number of routes, the BGP protocol has been widely used in the operator's network. At the same time, BGP is also commonly used in some large-scale enterprise networks to transmit routes.

[0028] According to the BGP protocol, an IBGP neighbor is used in an AS domain to transmit routes. However, due to the complexity of BGP configuration, the common usage scenario is to configure BGP on the border devices connected between AS and other ASs, and to advertise BGP routes by establishing non-directly connected IBGP neighbors among several border devices in ...

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Abstract

The present disclosure provides a routing method for traversing an autonomous system, which is applied to a border device running BGP. The method includes: receiving an announcement from an IBGP neighbor, including the address used by the IBGP neighbor when establishing a neighbor; The address used by the neighbor is the local address, and the address used by the IBGP neighbor to establish the neighbor is used as the peer address to establish a tunnel; for the BGP route advertised by the IBGP neighbor, the local interface of the tunnel is used as the outgoing interface. Route iteration. Through the technical solution disclosed in the present disclosure, the routing black hole is avoided, and at the same time, the performance of other devices and IGP in the AS will not be affected.

Description

technical field [0001] The present disclosure relates to the technical field of network communication, and in particular to a routing method and device for traversing an autonomous system. Background technique [0002] For management and expansion purposes, the Internet can be divided into many different AS (AutonomousSystem, autonomous system). In other words, the Internet is assembled by ASs. AS is a group of routing devices that have the same routing strategy and belong to the same technical management department. [0003] Routing protocols can be divided into two types: IGP (Interior Gateway Protocols, Interior Gateway Protocols) and EGP (Exterior Gateway Protocols, Exterior Gateway Protocols). IGP is a routing protocol used inside an AS to complete routing of data packets inside the AS. IGP only works within the AS and knows nothing about other ASs. EGP is a routing protocol used between multiple ASs. It is mainly used to complete the routing selection of data packe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/701H04L12/771H04L29/12H04L45/02H04L45/60
CPCH04L12/4633H04L45/033H04L61/00H04L45/02H04L45/04H04L45/30H04L47/2441
Inventor 徐伟
Owner NEW H3C TECH CO LTD
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