Use this command to set the preference, (also known as administrative distance), of BGP routes. Different distance values can be configured for routes learned from external peers, routes learned from internal peers, and BGP routes locally originated. A route with a lower preference value is preferred to a route with a higher preference value to the same destination. Routes with a preference of 255 may not be selected as best routes and used for forwarding.
The change to the default BGP distances does not affect existing routes. To apply a distance change to existing routes, you must force the routes to be deleted from the RIB and relearned, either by resetting the peers from which the routes are learned or by disabling and re-enabling BGP.
| Default |
|
| Format | distance bgp external-distance internal-distance local-distance |
| Mode | IPv4 VRF Address Family |
| Parameter | Description |
|---|---|
| external-distance | The preference value for routes learned from external peers. The range is 1 to 255. |
| internal-distance | The preference value for routes learned from internal peers. The range is 1 to 255. |
| local-distance | The preference value for locally-originated routes. The range is 1 to 255. |
