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Method and device for transmitting data message based on PW (Packet Writing) redundant backup

A data packet, redundant backup technology, applied in the field of communication, can solve the problem of data packet error discarding, etc., to achieve the effect of fast switching, speeding up switching speed, and reducing signaling interaction

Active Publication Date: 2011-11-23
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] To sum up, in the prior art, for the redundant backup of the same-homing PW and the redundant backup of the dual-homing PW, data packets will be incorrectly discarded (for example, PE1 incorrectly discards the data packets received from the standby PW link )

Method used

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  • Method and device for transmitting data message based on PW (Packet Writing) redundant backup
  • Method and device for transmitting data message based on PW (Packet Writing) redundant backup
  • Method and device for transmitting data message based on PW (Packet Writing) redundant backup

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Embodiment Construction

[0055] In the prior art, for the same-homing PW redundant backup and the dual-homing PW redundant backup, PE1 assigns different VC labels to the active PW link and the standby PW link. When the active PW link is used for communication, PE1 forwards the The opposite end sends the data packet carrying the VC label corresponding to the main PW link to the corresponding CE device, and discards the data packet from the opposite end carrying the VC label corresponding to the standby PW link.

[0056] by Figure 5 The dual-homing PW redundant backup network shown in the figure is an example. PE1 and PE2 establish a primary PW link, and PE1 and PE3 establish a backup PW link. In the receiving direction of PE1, PE1 assigns VC label 1 to the primary PW link. , and assign VC label 2 to the standby PW link; PE1 notifies PE2 of VC label 1 and notifies PE3 of VC label 2.

[0057] In addition, PE1 will create local label entry 1 based on VC label 1, and local label entry 2 based on VC label...

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Abstract

The invention discloses a method and a device for transmitting data message based on PW (Packet Writing) redundant backup, wherein the method comprises the following steps that: a local terminal PE (Provider Edge) device distributes a same VC (Visual C) tag to an active PW link and a standby PW link, and sends the VC tag to an opposite terminal PE device; and the local terminal PE device receives a data message form the opposite terminal PE device via the active PW link or the standby PW link, and sends the data message via the VC tag carried in the data message. In the invention, the error discarding of the data message can be avoided.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data message transmission method and equipment based on PW redundancy backup. Background technique [0002] MPLS (Multiprotocol Label Switching, Multiprotocol Label Switching) L2VPN (Layer 2 Virtual Private Network, Layer 2 Virtual Private Network) provides a Layer 2 VPN service based on MPLS networks, enabling operators to provide services based on Layer 2 VPN of different data link layers (such as ATM, FR, VLAN, Ethernet, PPP, etc.). For MPLS L2VPN, its classification method is as follows: MPLS L2VPN is divided into point-to-point VPWS (Virtual Private Wire Services, virtual private wire service) and point-to-multipoint VPLS (Virtual Private LAN Services, virtual private local area network service). [0003] MPLS L2VPN can transparently transmit Layer 2 data on the MPLS network. From the user's point of view, the MPLS network is a Layer 2 switching network tha...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/56H04L12/70
Inventor 鄢能叶金荣
Owner NEW H3C TECH CO LTD
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