Tim OBrien
asked on
Cisco Switch Mac Flapping - SW_MATM-4-MACFLAP_NOTIF
A vendor installed a camera system at one of our locations. When reviewing the logs on the switch I am seeing.
Oct 8 13:51:23: %SW_MATM-4-MACFLAP_NOTIF: Host 0003.c50c.32ed in vlan 1 is flapping between port Fa0/1 and port Fa0/2
Oct 8 13:51:56: %SW_MATM-4-MACFLAP_NOTIF: Host 0003.c50c.32ed in vlan 1 is flapping between port Fa0/1 and port Fa0/2
%SW_MATM-4-MACFLAP_NOTIF: Host 0010.8d03.da63 in vlan 1 is flapping between port Fa0/2 and port Fa0/3
1 0003.c50c.32ed DYNAMIC Fa0/1
1 0004.5f43.2642 DYNAMIC Fa0/2
1 0010.8d03.da63 DYNAMIC Fa0/3
1 0016.6c8e.286d DYNAMIC Fa0/2
1 0021.b7ba.1a95 DYNAMIC Fa0/2
1 0022.3b0a.3041 DYNAMIC Fa0/2
1 00d0.c9c5.b50b DYNAMIC Fa0/2
1 a0d3.c109.8806 DYNAMIC Fa0/2
1 b8ca.3a98.667c DYNAMIC Fa0/2
1 c81f.6615.ef4e DYNAMIC Fa0/2
1 c81f.6616.23b0 DYNAMIC Fa0/2
1 c89c.1df2.d4e2 DYNAMIC Fa0/2
1 c89c.1df2.d4e3 DYNAMIC Fa0/2
I assume there is a un-managed switch that he connected to the switch and is causing the loop. The switch has 3 "things" connected to it. I am fairly certain the un-managed switch is connect to Fa0/2 so I entered "spanning-tree bpduguard enable" but after running this command I lost connect to the switch. Currently I am waiting for someone on-site to reboot the switch and I will try again.
Any suggestions of how to fix this issue. Thanks!
Oct 8 13:51:23: %SW_MATM-4-MACFLAP_NOTIF: Host 0003.c50c.32ed in vlan 1 is flapping between port Fa0/1 and port Fa0/2
Oct 8 13:51:56: %SW_MATM-4-MACFLAP_NOTIF: Host 0003.c50c.32ed in vlan 1 is flapping between port Fa0/1 and port Fa0/2
%SW_MATM-4-MACFLAP_NOTIF: Host 0010.8d03.da63 in vlan 1 is flapping between port Fa0/2 and port Fa0/3
1 0003.c50c.32ed DYNAMIC Fa0/1
1 0004.5f43.2642 DYNAMIC Fa0/2
1 0010.8d03.da63 DYNAMIC Fa0/3
1 0016.6c8e.286d DYNAMIC Fa0/2
1 0021.b7ba.1a95 DYNAMIC Fa0/2
1 0022.3b0a.3041 DYNAMIC Fa0/2
1 00d0.c9c5.b50b DYNAMIC Fa0/2
1 a0d3.c109.8806 DYNAMIC Fa0/2
1 b8ca.3a98.667c DYNAMIC Fa0/2
1 c81f.6615.ef4e DYNAMIC Fa0/2
1 c81f.6616.23b0 DYNAMIC Fa0/2
1 c89c.1df2.d4e2 DYNAMIC Fa0/2
1 c89c.1df2.d4e3 DYNAMIC Fa0/2
I assume there is a un-managed switch that he connected to the switch and is causing the loop. The switch has 3 "things" connected to it. I am fairly certain the un-managed switch is connect to Fa0/2 so I entered "spanning-tree bpduguard enable" but after running this command I lost connect to the switch. Currently I am waiting for someone on-site to reboot the switch and I will try again.
Any suggestions of how to fix this issue. Thanks!
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ASKER
Thanks for all your help, When I got there my boss already pulled the dummy switches and moved everything to the comnet switch. I don't know exactly what was causing the problems. Appreciate your help
ASKER
The vendor took a picture and from what it looks like.
VPN 800 Series Series Router --> 6 Port TrendNet --> Plugged into a Comnet Switch
http://www.comnet.net/comnet-products/ethernet/managed-switches/cwge26fx2tx24mspoe.html
I had no idea the building approved the purchase for this switch as we want cisco switches only so we can manage them ourselves. Going to ask to return this switch and replace it with a 24-Port Cisco Switch.
Would it be an issue having the TrendNet plugged into the Comnet Switch? After talking with the vendor things seem to be working fine and I may have thought their was an issue from reviewing those logs and seeing the MACFLAP logs. Now I'm not sure if I could have simply ignored the error or do you think that was indicating an issue?