08-04-2015 09:20 AM - edited 07-05-2021 03:41 AM
currently we are facing vlan flapping issue. The flapping occurs on Vlan 99, this vlan is for all the wireless APs. any desgin issue i should take note of
08-04-2015 03:03 PM
Makes sense you'll be seeing "flapping" error messages.
Look to the left, there is a 3650 connected to the servers. It has multiple uplinks to the same switches. Look at the speed of the uplinks, they are different speed. So I will presume the ports are NOT in an etherchannel.
08-20-2015 09:13 AM
thank you for the response, after some discussion with the partner on the details and some searches on the web, we found this solution...that was posted a while ago.
Disable mac-move notificationn
no mac address-table notification
"It is very normal on switch to display this mac flapping message if APs are connected to the switch port. The reason for this is due to the fact that switch learns of a particular clients mac from one particular port to which the AP (assume this is AP01)is connected to. Now when the wireless client roam to other AP( assume AP02 which is connected on a different port of same switch where AP01 is connected) the switch will learn that same MAC address on a different port I.e AP02's port and displays the mac flap message."
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