An SR-TE LSP with a path definition that includes router R4 as a loose hop and for which Seamless-BFD has been enabled is following the path shown in the exhibit. What happens after router R4 fails if the routers along the path follow the default behavior?
When router R4 fails and Seamless-BFD is enabled, the head end can detect the path failure. However, by default, the head end will continue to forward traffic to the current next-hop (R2). This traffic will be discarded at the point of failure because the path is not adjusted immediately or redirected. This results in traffic being blackholed. Therefore, the correct answer is that the head end will continue forwarding traffic to the current next-hop indefinitely, which will be discarded at the point of failure.
Answer is C. The two options for actions that an LSP will take when Seamless BFD session fails for the active path are: - None (this is the default action): When the Seamless BFD session goes DOWN, the LSP will remain UP and traffic will be blackholed. - Failover-or-down. When Seamless BFD session goes down, the headend will try to move the traffic to another LSP path if available. If no path is available, the LSP will change to DOWN.
Since Seamless-BFD is enabled, Head-end can detect the path failure. Retry-on-error is enabled by default.
This is the default behavior...C
correct