I get lots of those from time to time. It's usually when the server team is installing a new virtual server on a VMware host. On VMware, each virtual server has its own individual MAC address. If you create a new server, it generates frames from 00:00:00:00:00:00 until it has been correctly configured.
Do you have a VMware host or something similar on that port?
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 custome...