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
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[0055] In the prior art, for the same-homed PW redundant backup and dual-homed PW redundant backup, PE1 will assign different VC labels to the primary PW link and the backup PW link. When the primary PW link is used for communication, PE1 forwards The data message carrying the VC label corresponding to the primary PW link is sent to the corresponding CE device from the opposite end, and the data message carrying the VC label corresponding to the backup PW link from the opposite end is discarded.
[0056] To Figure 5 As an example, the dual-homed PW redundancy backup networking diagram is shown as 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 will assign VC label 1 to the primary PW link. , And assign VC label 2 to the backup 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 ent...
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