Wireless Access

Reply
Contributor II
Posts: 59
Registered: ‎05-23-2011

AP ports flapping

We have a number of AP's plugged into a Cisco C29060X.

 

We're getting a number of port flap messages:

Jun 10 03:56:36: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/10 and port Gi1/0/5
Jun 10 04:07:28: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/5 and port Gi1/0/6
Jun 10 04:07:28: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi2/0/40 and port Gi2/0/48
Jun 10 04:14:23: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/5 and port Gi1/0/6
Jun 10 04:14:59: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/5 and port Gi1/0/6
Jun 10 04:20:19: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 04:41:33: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Po1 and port Gi2/0/9
Jun 10 04:56:27: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/3 and port Gi1/0/36
Jun 10 05:11:36: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/3 and port Gi1/0/2
Jun 10 05:22:51: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/36 and port Gi1/0/45
Jun 10 05:22:51: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi2/0/40 and port Gi2/0/48
Jun 10 05:24:32: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/5 and port Gi1/0/6
Jun 10 05:24:32: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi2/0/6 and port Gi2/0/40
Jun 10 05:30:23: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi2/0/9 and port Gi2/0/6
Jun 10 05:31:47: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 05:46:39: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 06:01:45: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 06:20:08: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/5 and port Gi1/0/6
Jun 10 06:30:52: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/5 and port Gi1/0/6
Jun 10 06:30:52: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi2/0/6 and port Gi2/0/40
Jun 10 06:46:02: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi2/0/6 and port Po1
Jun 10 06:49:36: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 07:01:50: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/10 and port Gi1/0/5
Jun 10 07:19:54: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 07:56:01: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 08:21:41: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/5 and port Gi1/0/6
Jun 10 08:21:41: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi2/0/6 and port Gi2/0/40
Jun 10 08:26:18: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 08:29:19: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3
Jun 10 08:41:24: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi2/0/6 and port Gi1/0/10
Jun 10 08:55:40: %SW_MATM-4-MACFLAP_NOTIF: Host 001a.1e00.b6e8 in vlan 20 is flapping between port Gi1/0/6 and port Gi1/0/3

 

Tracing back the mac of the host flapping, it looks like it belongs to Aruba...trying to troubleshoot why this is happening.  Thanks in advance!!

 

Aruba Employee
Posts: 60
Registered: ‎07-24-2014

Re: AP ports flapping

Hi,

Could you please let us know the AP model and AOS version?
Output of 'show ap debug system-status ap-name <AP Name>'.
What is the power, speed and duplex negotiated by AP from switch port?
Any changes on the network?
Frequent Contributor I
Posts: 76
Registered: ‎01-03-2014

Re: AP ports flapping

a "mac flap" message is because the switch is seeing a packet with the same source mac address comming in on a different port (and flipping back and forth). my guess would be that you have an ap with two ports (22x or 32x) plugged into the same switch, and the two ports are not channeled together.


#AirheadsMobile
Contributor II
Posts: 59
Registered: ‎05-23-2011

Re: AP ports flapping

The AP model is an AP-215.  AOS version 6.4.3.6

Negotiated at 1gbps/full duplex

No changes on network, but don't know how long this has been occuring.  It's happening a number of places. 

Switch model is Cisco WS-C2960X-48FPD-L 

 

Attached ouput of command

Contributor II
Posts: 59
Registered: ‎05-23-2011

Re: AP ports flapping

Texasables,

 

Thanks for the suggestion.  This is an AP-215 which only has one port :-(

Frequent Contributor I
Posts: 76
Registered: ‎01-03-2014

Re: AP ports flapping

in your first example, what is connected on port g2/0/6 and g1/0/10, what is connected on g1/0/6 and g1/0/3?


#AirheadsMobile
Contributor II
Posts: 59
Registered: ‎05-23-2011

Re: AP ports flapping

All 4 of these ports are connected to AP-215's.

Search Airheads
Showing results for 
Search instead for 
Did you mean: