Graceful transition in a connectivity test when a discriminator is changed in a Seamless Bidirectional Forwarding Detection (S-BFD) reflector node

A method implemented by a node configured to operate in a network, the node is a Seamless Bidirectional Forwarding Detection (S-BFD) reflector node configured to operate an S-BFD session with an S-BFD initiator node, and the method comprising steps of:

• responsive to an S-BFD discriminator change in the S-BFD session to a new discriminator for the S-BFD session, caching an old discriminator for the S-BFD session;
• and
• receiving, processing, and responding to a S-BFD request from the S-BFD initiator node with an S-BFD response including one of the new discriminator or the old discriminator.

A non-transitory computer-readable medium configured to store computer logic having instructions that, when executed, enable a processing device to perform steps of:

• the processing device is in a node configured to operate in a network, the node is a Seamless Bidirectional Forwarding Detection (S-BFD) reflector node configured to operate an S-BFD session with an S-BFD initiator node, responsive to an S-BFD discriminator change in the S-BFD session to a new discriminator for the S-BFD session, caching an old discriminator for the S-BFD session;
• and
• receiving, processing, and responding to a S-BFD request from the S-BFD initiator node with an S-BFD response including one of the new discriminator or the old discriminator.