Adjacency Information Off the Router

msfc_15#show adjacency detail

Protocol Interface                 Address

IP       Vlan3                     10.1.3.2(7)

0 packets, 0 bytes

0004C0D0AC38

0005741804BC0800

                                   ARP        02:57:46

CEF addresses numerous issues that MLS could not. First and foremost, it is more scalable than MLS. Enterprise networks have grown in size and the types of services it has made available to its users in the past three years. The creation and deletion of a high number of flows affected the performance of the switch, and subsequently created greater latency on the network. Therefore, CEF had to address scalability issues. The second major problem was the flow-based switching algorithm's inefficient cache table lookup. CEF, as mentioned earlier, offers a better mechanism to do lookups and allows for latency to be low. The obvious advantage was that most traffic never hit the router; the packets were hardware switched. CEF, as a result, addressed issues with scalability, latency, and overall robustness.