often i get mac address flap error in switches, but unable to identify the cause for some cases.
Two switches AS1 and AS2 are connected to DS and i am seeing host mac address connected to AS1 being learnt from AS2 connected port in DS under same vlan 100. There is no physical loop in this connectivity. While checking i found mac address aging timer higher in DS (480s) than in AS1(30s) and AS2(30s). Even when the host pc goes down it takes some time for the address to get flushed in DS mac table. Would this be causing this mac flap ?
Find out what those hosts which are falpping in the swichtes first.
(1) Loop in the network (what is on the other end of those trunks in the connectivity ? and are they otherwise interconnected?) (2) Port-channel incompatibility (your pasted configuration was not a channel-group, but what about the other end?) (3) If you have wireless that bridges AP traffic to the wired network, it could be "roaming" clients
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...