When does a router remove a static route from the RT?

[soltantde2]

No tracking involved I just want to understand the default behaviour. I know it removes it if the line protocol on the exit interface goes down, but does it also check the next hop reachability from time to time?

[balaji.bandi]

the route not available if the Physical gone down, sure it will be appear when the Physical connection back.

yes it does on background and install route when the link restored.

[MHM Cisco World]

I think this double post 

MHM