I'm concerned that some device, such as an AP, is participating in the STP negotiation. Note that you should see some MAC address flapping as wireless devices roam from one AP to another, but it sounds to me like your entire network is reconverging, which indicates greater issues with spanning tree. Include what type of links are being used, and whether any are port channels.
VSS CISCO MAC ADDRESS FLAPPING FULL
I think a full network diagram showing all switches and how they are connected will be helpful. Which spanning tree protocol are you using? Did you do anything to help designate a spanning tree root bridge? I am very concerned that you said things are in a ring. Switch which bridge-group's root is managed 12.2(35)SE or later. Root of vlan and root with bridge-group are separated. "%SW_MATM-4-MACFLAP_NOTIF:" message outputs when root of vlanĪnd bridge-group with root are separated. Mac address flap message continuously arises with vlan-bridgeSymptom: There is a chance that the topology you have chosen will produce this message, but that the message my be just a Cisco artifact. Unless your switches are part of an Internet backbone somewhere, the chances of malicious STP re-writes occurring is about zero. 5 seconds to work out the topology is fine. Simply enabling STP and allow the network to take. In most cases, BPDU guard and port-fast are not required. Typically, this is a symptom of an L2 loop. How do i go about tracking and resolving this? * Can the dumb switches be causing it (Seen occurance between a Trunk and small network switch) * Can wifi AP's cause the MAC flapping? (Seen one occurance between a TRUNK port and an AP I'm really looking for some guidance around When the flapping occurs I'm seeing it happen on all my core VLAN's as well as on the ports these dumb switches are on. These are programmed as a "VLAN" on the core network switches and then defaul VLAN on these extra devices. We also have 2 links into 2 other small networks (2 switches) where the switches are setup as "dumb". We have a few UBNT wifi AP's which have a trunk and native VLAN to various switches. We have spanning-tree tree turned on as well a BPDU Guard on majority of the ports. Our network is Primarily Cisco switches with Trunk ports between them in a ring.
The issue seems to come and go randomly over the past few weeks which is why I can't seem to find it. The strange part to me is that we seem to be having this issue accross all our network devices, even edge switches. We've had some weird MAC flap issues occur on our network.
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