the main difference is that PAgP is Cisco-proprietary, while LACP is IEEE defined (802.3ad), AFAIK, the protocols are quite similiar, with a few exceptions, e.g. LACP does not support half-duplex links.
I guess it can be compared to duplex and speed autonegotiatin in Ethernet environments. Setting speed and duplex to a fixed value on both sides is preferable when you are sure that either side will never be used for anything else than the device it is connected to. So, I would always disable negotiation if possible...
Just thought I'd throw in another bit of info... if you're using 3750s and want to do FEC to two switches in a stack you need to manually configure it using the 'channel-group 1 mode on' command on the ports as opposed to using PAgP or LACP.
Which is handy sometimes.
Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
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...