distance eigrp internal-distance external-distance
no distance eigrp
internal-distance Administrative distance for Enhanced IGRP (EIGRP) internal routes. Internal routes are those that are learned from another entity within the same autonomous system. The distance can be a value from 1 to 255. external-distance Administrative distance for EIGRP external routes. External routes are those for which the best path is learned from a neighbor external to the autonomous system. The distance can be a value from 1 to 255.
To allow the use of two administrative distances--internal and external--that could be a better route to a node, use the distance eigrp command in router configuration mode. To reset these values to their defaults, use the no form of this command.
An administrative distance is a rating of the trustworthiness of a routing information source, such as an individual router or a group of routers. Numerically, an administrative distance is an integer from 0 to 255. In general, the higher the value, the lower the trust rating. An administrative distance of 255 means the routing information source cannot be trusted at all and should be ignored.
Use the distance eigrp command if another protocol is known to be able to provide a better route to a node than was actually learned via external EIGRP, or if some internal routes should really be preferred by EIGRP.
The following table lists the default administrative distances
Route Source Default Distance Conected interface 0 Static route 1 Enhanced IGRP summary route 5 External BGP 20 Internal Enhanced IGRP 90 IGRP 100 Open Shortest Path First (OSPF) 110 Intermediate System-to-Intermediate System (IS-IS) 115 Routing Information Protocol (RIP) 120 Exterior Gateway Protocol (EGP) 140 EIGRP external route 170 Internal Border Gateway Protocol (BGP) 200 Unknown 255
To display the default administrative distance for a specified routing process, use the show ip protocols EXEC command.
In the following example, the router eigrp global configuration command sets up Enhanced IGRP routing in autonomous system number 109. The network router configuration commands specify Enhanced IGRP routing on networks 192.168.7.0 and 172.16.0.0. The distance eigrp command sets the administrative distance of all EIGRP internal routes to 80 and all EIGRP external routes to 130.Router(config)#router eigrp 109 Router(router-config)#network 192.168.7.0 Router(router-config)#network 172.16.0.0 Router(router-config)#distance eigrp 80 130
You cannot set the administrative distance in EIGRP against certain routes or sources, as you can with other protocols. The command does not work this way with EIGRP.
show ip protocols
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