The delay of a BFD session to go Up is configured to prevent traffic loss because a routing protocol goes Up later than an interface.
On a live network, some devices switch traffic based only on the Up state of a BFD session. If a routing protocol goes Up later than an interface, no route is available for switching traffic back, although the BFD session goes Up. As a result, traffic is discarded. The delay must be set to compensate for the time difference caused when the routing protocol goes Up later than the interface.
Before configuring the delay of a BFD session to go Up, ensure that the router is running properly.
The system view is displayed.
BFD is enabled globally on the local node, and the BFD view is displayed.
BFD can be configured only after the bfd command is run globally.
The delay of the BFD session to go Up is set.
The configuration is committed.