Categories
CCNP Enterprise Core (350-401) Cisco Routing

Prefix Selection

When a packet needs to be forwarded, the chosen route is dependant on that routes prefix length. A /30 (255.255.255.252) would be preferred over a /24 (255.255.255.0) due to a more specific match.

This forward decision is part of the Forwarding Information Base (FIB) rather than Routing Information Base (RIB).

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.