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Route update method and router

An update method and router technology, applied in the field of communication, can solve the problems of not being able to perceive switches and PE1 in time

Active Publication Date: 2011-09-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] by figure 1 For example, the provider edge device (Provider Edge, PE) 3 cannot detect the failure between PE1 and the connected customer edge device (Customer Edge, CE) CE1 in time
For example, PE1 cannot detect the failure of Switch (Switch, SW) 2 in time, or the link between SW2 and SW1 is faulty.

Method used

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  • Route update method and router

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] figure 2 It is a flow chart of the route update method provided by the embodiment of the present invention. Specifically include the following:

[0031] 201: Receive a first routing message to a first destination issued by a first router, where the first routing message includes a first routing priority. The first router is the master router, and the first router and the second router form a router backup group through the VRRP protocol. The priority of the route to the first destination advertised by the first router is higher than the priority of the route to the first destination advertised by the second router.

[0032] Regarding how to realize that the priority of the route to the first destination advertised by the first router is higher than the priority of the route to the first destination advertised by the second router to neighboring routers, the following methods can be adopted (for details, see image 3 ):

[0033] 301: The first router queries which o...

Embodiment 2

[0080] Figure 6 A schematic diagram of a router provided by an embodiment of the present invention. The router provided in this embodiment can be realized through the route update method provided in Embodiment 1. The router specifically includes the following units:

[0081] 601: A routing message receiving unit. The routing message receiving unit is used to receive the first routing message issued by the first router to the first destination, and the first routing message contains the first routing priority; and is used to receive the routing message issued by the second router to the first destination. The second routing message, where the second routing message includes the second routing priority.

[0082] Regarding how to realize that the priority of the route to the first destination advertised by the first router is higher than the priority of the route to the first destination advertised by the second router to neighboring routers, the method provided in Embodiment...

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Abstract

Embodiments of the present invention provide a route update method, which includes: receiving a first route message issued by a first router indicating that a route can reach a first destination, wherein the first route message includes a first route priority; receiving a second route message issued by a second router indicating that a route can reach the first destination, wherein the second route message includes a second route priority; selecting the route corresponding to a higher route priority between the first route priority and the second route priority as a forwarding route, wherein,the first router and the second router compose a router backup group through Virtual Router Redundancy Protocol (VRRP), when the first router is a primary router and the second router is a backup router, the first route priority is higher than the second route priority. Furthermore, embodiments of the present invention also provide a corresponding router. The route update method and the router supposed by the embodiments of the present invention can ensure that the Provider Edge (PE) equipments can promptly perceive failures between remote PE equipments and the Customer Edge (CE) equipments connected with the remote PE equipments.

Description

technical field [0001] The invention relates to the communication field, in particular to a route updating method and a router. Background technique [0002] Routers are widely used in the network. After the packet arrives at the router, the next hop is determined according to the routing and forwarding table of the router, and then reaches the destination in this way. Therefore, when a certain router in the network fails, it is necessary to maintain the correct routing and forwarding table in time. This is crucial for the timely and accurate arrival of packets to their destinations. [0003] In the prior art, a correct routing and forwarding table is maintained through static routing and dynamic routing. Static routing needs to be set manually, and it is difficult to maintain the correct routing and forwarding table in time. Dynamic routing, such as Border Gateway Protocol (BGP), can discover whether a router directly connected to it is reachable through a link failure ...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/24H04L45/28H04L45/02H04L45/24
CPCH04L45/12H04L45/04H04L45/586H04L45/02H04L45/22H04L45/00
Inventor 陈双龙
Owner HUAWEI TECH CO LTD
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