When each routing protocol on a router receives information, it will attempt to install any routing paths into the routing table.
If the route already exists in the routing table, the administrative distance is compared and the routing protocol with the lower administrative distance is inserted into the routing protocol.
| Routing Protocol | Default Administrative Distance |
| Connected | 0 |
| Static | 1 |
| EIGRP Summary Route | 5 |
| External BGP (EBGP) | 20 |
| EIGRP (Internal) | 90 |
| OSPF | 110 |
| IS-IS | 115 |
| RIP | 120 |
| EIGRP (External Sourced) | 170 |
| Internal BGP (IBGP) | 200 |