Distance command

Filter and change AD of routes before they enter the RIB.

1-) Protocol independent "distance" command:
distance AD advertising_router_ip wildcard access-list

You can have multiple distance commands.
Also a default distance that will apply to any routes not defined in another "distance" command.

2-) Protocol dependent:

With this you can change the AD of an external/internal route for EIGRP, external/inter-area/intra-area route for OSPF and so on.

Eg:
distance ospf external 125 (sets all the external OSPF routes that are learned with and AD of 125)