Static Routes

static routes are entered by an administrator who wants to manually configure the best path to the destination. For that reason, static routes have a default AD value of 1. This means that after directly connected networks, which have a default AD value of 0, static routes are the most preferred route source.
There are situations when an administrator will configure a static route to the same destination that is learned using a dynamic routing protocol, but using a different path. The static route will be configured with an AD greater than that of the routing protocol. If there is a link failure in the path used by the dynamic routing protocol, the route entered by the routing protocol is removed from the routing table. The static route will then become the only source and will automatically be added to the routing table.
A static route using either a next-hop IP address or an exit interface has a default AD value of 1. However, the AD value is not listed in show ip route when you configure a static route with the exit interface specified. When a static route is configured with an exit interface, the output shows the network as directly connected via that interface.


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