The main purpose of CDP is to tell you about the physical connection to the neighbour. In fact it is very useful like that because it can tell you if your cabling is correct. As for being layer-2, I suppose you could say it is a link-layer protocol.
Consider what happens if you have cabled wrongly, and your two links actually go to different switches. Actually, that might even be correct if you are using VSS on 6500 or vPC on Nexus. But which of the two neighbours would you say was the neighbour on the port-channel?
If you are using LACP or PAgP, there are other ways of finding out who is at the other end of the port-channel.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...