Editing Cisco Commands (section)

== Administrative Distance ==

Determines which route is preferred when multiple routes to the same destination exist.

Common values:
 Connected – 0
 Static – 1
 EIGRP – 90
 OSPF – 110
 RIP – 120

Chart pulled from https://en.wikipedia.org/wiki/Administrative_distance#Default_administrative_distances
{| class="wikitable" style="text-align:center"
! Routing protocol !! Administrative distance
|-
| Directly connected interface || 0 (Only the interface itself has an administrative distance of 0, since a route cannot have a distance of less than 1.)
|-
| Static route || 1
|-
| Dynamic Mobile Network Routing (DMNR) || 3
|-
| EIGRP summary route || 5
|-
| External BGP || 20
|-
| EIGRP internal route || 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
|-
| On Demand Routing (ODR) || 160
|-
| EIGRP external route || 170
|-
| Internal BGP || 200
|-
| Next Hop Resolution Protocol (NHRP) || 250
|-
| Default static route learned via DHCP || 254
|-
| Unknown and unused || 255 (An administrative distance of 255 causes the router to remove the route from the routing table and not use it.)
|}