Daniel Gröber authored Feb 21, 2023 and Juliusz Chroboczek committed Mar 18, 2023

When shutting down we currently remove routes from the kernel FIB without
waiting for our final hellos to propagate through the network. This could
cause us to either form loops or blackhole traffic using whichever external
routes remain.

Instead let the operator define a suitable delay for their network to
ensure complete propagation of retractions and divert traffic before doing
anything drastic.