Unlike dynamic routes, static routes do not have a dedicated fault detection mechanism. If a link fault occurs on the network, the administrator needs to rectify it. Bidirectional Forwarding Detection (BFD) for static routes can be used to bind a static route to a BFD session so that the BFD session can detect the status of the link associated with the static route.

• If the BFD session bound to a static route detects a link fault, BFD reports the link fault to the Routing Management (RM) module. The RM module then sets the route to inactive, and this route is no longer available in the routing table.

• If the BFD session bound to a static route detects that the faulty link has been re-established, BFD reports a message to the RM module. The RM module then sets the route to active, and this route becomes available in the IP routing table once again.

For more details about BFD, see Understanding BFD in "BFD Configuration" in the S7700 and S9700 V200R011C10 Configuration Guide - Reliability.