What is the Administrative Distance (AD) for External BGP routes?

The Administrative Distance (AD) for External BGP (Border Gateway Protocol) routes is 20. This value reflects the reliability of the routing protocol to the routing table. In the context of routing, the lower the AD, the more preferred the route is. Therefore, External BGP is given a relatively low AD compared to other routing protocols, indicating it is trusted and often preferred over other sources of routing information.

This makes External BGP suitable for exchanging routing information between different autonomous systems, as it allows for the efficient and effective management of routing across complex networks. Understanding Administrative Distances helps network professionals configure routing protocols accurately and troubleshoot routing issues by determining the preferred paths within a network.