Packet transmission method and device in multi-protocol label switching network

A multi-protocol label and packet transmission technology, applied in the field of packet transmission methods and devices, can solve problems such as troublesome implementation, affecting switching speed, etc., and achieve the effects of improving switching speed, convenient traffic switching, and simple management

Active Publication Date: 2010-02-10
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the above two methods, since the sending labels corresponding to the active PW and the standby PW are not the same, it is necessary to store two sets of sending label forwarding tables at the f

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  • Packet transmission method and device in multi-protocol label switching network
  • Packet transmission method and device in multi-protocol label switching network
  • Packet transmission method and device in multi-protocol label switching network

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Embodiment Construction

[0033] 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.

[0034] The method provided by the present invention mainly includes: assigning a PW label on the PW head node, wherein the PWs that are mutually active and standby assign the same PW label; In the label forwarding table item; the PW tail node stores the corresponding relationship between the PW label and the VPN bound to the PW as a receiving label forwarding table item in the receiving label forwarding table corresponding to the tunnel carrying the PW; the PW header After the node receives the packet, it searches for the PW label in the corresponding sending label forwarding entry of the packet, adds the PW label to the packet, encapsulates it using the current available tunnel, and sends it to the PW tail node.

[0035] Since the label allocatio...

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Abstract

The invention provides a packet transmission method and a device in multi-protocol label switching network (MPLS), wherein the method comprises the following steps: a PW label is distributed on a virtual connection (PW) head node, wherein the same PW label is distributed to mutual active-standby PWs; the PW head node stores the PW label in a sending label transmitting table entry corresponding toVPN bound by the PW; a PW tail node takes the PW label and the corresponding relation between the PW label and the VPN bound by the PW as a receiving label transmitting table and stores the receivinglabel transmitting table in a receiving label transmitting table corresponding to a tunnel loading the PW; after the PW head node receives a packet, the PW label in the sending label transmitting table entry corresponding to the VPN of the packet is searched; the PW label is added on the packet, and is sent to the PW tail node after being packaged by the current usable tunnel. The invention can conveniently realize flow switching and increase switching speed.

Description

technical field [0001] The invention relates to network communication technology, in particular to a packet transmission method and device in a multi-protocol label (MPLS) network. Background technique [0002] Multi-protocol label switching (MPLS) encapsulates network layer packets with short and fixed-length labels, and forwards them according to labels, avoiding complicated route lookup and forwarding. IP-based virtual private network (VPN) services can be easily implemented through MPLS technology, and can meet the needs of VPN scalability and management. [0003] In the MPLS technology, virtual connection (PW) technology can be used, that is, the operator's edge (PE) routers are connected to each other through PW, such as figure 1 As shown, taking the Virtual Private Wire (VPWS) architecture as an example, the PW is carried by a tunnel at the lower layer. The tunnel can be an MPLS LSP tunnel or a Generic Routing Encapsulation (GRE) tunnel. Thousands of entries. The l...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/24H04L45/50
Inventor 叶金荣
Owner NEW H3C TECH CO LTD
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