Default Routes and Floating Static Routes
Default routes are the routes that used by a router when there is no other route is known for a destination address. We can use the below picture. Here if to a destination there is no route on SR 1 then SR 1 will use the next hope that is mentioned as defaul-route. And this will be SR 2 here.
A:SR 1 # configure router static-route 0.0.0.0/0 next-hop 10.1.1.2
Floating Static Routes
A floating static route is a static route with an administrative distance higher than the routing protocol that is used in the network. And if the route that is learned by routing protocol is lost, then the floating static route apper.
The command is like static route, only with metric parameter addition.
A:SR 1# configure router static-route 10.10.10.2/32 next-hop 10.2.4.4 metric 20
Here, we assumed that we use OSPF in our network. And internal OSPF route pereference is 10 in Alcatel-Lucent Service Routers. So when we use the floating route with metric 20, if the OSPF route to this destination lost, then our floating static route will be used.
I hope this post will be helpfull for you…
You can also read how to configure
Static Route Configuration On Alcatel-Lucent Routers.