An active, properly configured, directly connected interface actually creates two routing table entries. The figure displays the IPv4 routing table entries on R1 for the directly connected network 192.168.10.0.
The routing table entry for directly connected interfaces is simpler than the entries for remote networks. The entries contain the following information:
- Route source - Identifies how the route was learned. Directly connected interfaces have two route source codes. ‘C’ identifies a directly connected network. ’L’ identifies the IPv4 address assigned to the router’s interface.
- Destination network - The address of the remote network.
- Outgoing interface - Identifies the exit interface to use when forwarding packets to the destination network.
Note: Prior to IOS 15, local route routing table entries (L) were not displayed in the IPv4 routing table. Local route (L) entries have always been a part of the IPv6 routing table.