Default Static Route

Method 1

R1(config)#ip route 0.0.0.0 0.0.0.0 168.13.1.101
R1(config)#end
R1#show ip route


S* signifies that the route is a STATIC DEFAULT ROUTE!!!!!!

Method 2

R2(config)#ip default-network 10.1.128.251
R2(config)#exit
R2#show ip route


S* signifies that the route is a STATIC DEFAULT ROUTE!!!!!!

How default routes are used

Classless routing - if a packet destination does not match any other routes forward to default route
Classful routing - when a packet's destination only matches the default route and no other route, only use the default route if no known classful addresses match the route either.