LABEL-SWITCHED PATH (LSP) ECHO REPLY VIA CO-ROUTED PATH IN SEGMENT ROUTED (SR) NETWORK
Publication Date: 2015-Mar-27
The IP.com Prior Art Database
Techniques are presented herein in which a Label-Switched Path (LSP) Initiator builds a co-routed return path from a Target FEC Stack (forward path). The Initiator marks the co-routed return segment stack with an index based on a local calculation. The Transit node uses the number of segments in the stack to detect the index and extract the return segment stack. These techniques help with a transit node (not just the egress node) reply via a co-routed path. No path computation is required on any transit/replying node.