Static route states follow VLAN states

IP static routes remain in the IP route table only so long as the IP interface to the next-hop router is up. If the next-hop interface goes down, the software removes the static route from the IP route table. If the next-hop interface comes up again, the software adds the route back to the route table.

This feature allows the routing switch to adjust to changes in network topology. The routing switch does not continue trying to use routes on unreachable paths, but instead uses routes only when their paths are reachable.

For example, the following command configures a static route to (with a network mask of, using as the next-hop router's IP address.

switch(config)# ip route

A static IP route specifies the route's destination address and the next-hop router's IP address or routing switch interface through which the routing switch can reach the destination. (The route is added to the routing switch's IP route table.)

In the above example, routing switch "A" knows that is reachable through port A2, and assumes that local interfaces within that subnet are on the same port. Routing switch "A" deduces that IP interface is also on port A2. The software automatically removes a static route from the route table if the next-hop VLAN used by that route becomes unavailable. When the VLAN becomes available again, the software automatically re-adds the route to the route table.