Cisco mac address on multiple interfaces

#CISCO MAC ADDRESS ON MULTIPLE INTERFACES FULL#

SW2 interface configurations: interface gigabitethernet51 Switchport trunk allowed vlan add 503,508,590 SW1 interface configurations: interface gigabitethernet51 Switchport trunk allowed vlan 1,503,508,590

#CISCO MAC ADDRESS ON MULTIPLE INTERFACES FULL#

Here is the current configuration for all switch-to-switch links as well as a the full mac address table for each switch.Д¬ore Switch interface configurations: interface GigabitEthernet1/1/1 What might be causing this periodic flap between ports?

How can I determine which switch this MAC address actually belongs When I remove the loop, The Core says the MAC is available through Po2 (The link to SW2), however SW2 says the MAC is available through Po1 (The uplink to the Core). The offending MAC address seems to be a Cisco MAC (Possible one assigned to a port group?) however I am unable to physically locate the switch to which it belongs.

%SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d5f2.0b9a in vlan 1 is flapping between port Po1 and port Po2 The problem I have is that the core switch periodically logs a MAC Flap event between the links to SW1 and SW2. Spanning-tree seems to be functioning as expected and the interface on SW3 that connects to SW4 is put into a blocking state. The links between all switches are trunks that allow vlans 1,503,508,590 The other switches are SG300 series small business switches.

(I have included a picture of the topology below). I'm working on a rather small Layer 2 network segment that contains a physical loop.

Cisco mac address on multiple interfaces