Administrative Distances RIP, OSPF, IGRP, EIGRP

Default Distance Value Table
This table lists the administrative distance default values of the protocols that Cisco supports:

Connected interface 0
Static route* 1
Enhanced Interior Gateway Routing Protocol (EIGRP) summary route 5
External Border Gateway Protocol (BGP) 20
Internal EIGRP 90
IGRP 100
OSPF110
Intermediate System-to-Intermediate System (IS-IS) 115
Routing Information Protocol (RIP) 120
Exterior Gateway Protocol (EGP) 140
On Demand Routing (ODR) 160
External EIGRP 170
Internal BGP 200
Unknown** 255

* A static route that points to the next hop IP address has an Administrative distance of 1. If the static route points to an outgoing interface, the static route has the Administrative distance of 0.
** If the administrative distance is 255, the router does not believe the source of that route and does not install the route in the routing table.