Protection switching in multiprotocol label switching (MPLS) networks

摘要

Protection switching in a multi-protocol label switching (MPLS) ring network with a protection label switch path that is shared by multiple working label switch paths may include receiving a packet intended for transmission towards a disconnected adjacent node on a working label switch path, and adding, to the received packet, a protection label and a merge label. The merge label may uniquely identify the working label switch path on which the packet is received. The packet may be transmitted on the protection label switch path.

主权项

1. A method for protection switching in a multi-protocol label switching (MPLS) ring network with a protection label switch path that is shared by multiple working label switch paths, the method comprising:
receiving, on a working label switch path, a packet intended for transmission towards a disconnected adjacent node on the working label switch path; adding, to the received packet, a protection label and a merge label in response to determining the received packet is intended for the transmission towards the disconnected adjacent node on the working label switch path, wherein the merge label uniquely identifies the working label switch path on which the packet is received and is known to nodes on the working label switch path identified by the merge label; and transmitting the packet on the protection label switch path.