Maybe mac learning can be slower with port-security turned on (ie for programming asic or whatever), however, the packet itself should not be delayed. This issue is giving us problems with SAP transactions timing out and being very slow. Will open TAC case for it. (i could increase the timeout value but that is giving us other problems, like when you move a pc , you have to wait time before connecting anyting else). Static programming of mac is the only "workaround".
It appears that the switch is not "slow" in learning, it just drops the first packet when port security is enabled (nice cisco) and the 3 seconds is a retransmit timer on the end-device (if you're using tcp, if you are using udp,video,voice,mmm, bad luck, packet gone!). See CSCeg63177
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...