flapping en Switch 4506

Eduardo Saa Ruiz · ‎01-04-2013

Hola Estimados, soy nuevo por aca y me gustaria si me pueden ayudar con el siguiente problema, hace tiempo que tengo este flapping en uno de los switch de core de la compañia, las interfaces Po4 y Po5 estan conectadas cada una a un WLC, si bien no es invasivo y no me ha generado mayores inconvenientes me gustaría que desaparecieran estos mensajes. al bajar las interfaces se deberia solucionar?, que me pueden decir

Jan 4 10:29:03: %C4K_EBM-4-HOSTFLAPPING: Host D0:DF:9A:D3:E1:BB in vlan 305 is flapping between port Po4 and port Po5

Jan 4 10:32:20: %C4K_EBM-4-HOSTFLAPPING: Host D0:DF:9A:D3:E1:BB in vlan 305 is flapping between port Po5 and port Po4

Jan 4 11:40:31: %C4K_EBM-4-HOSTFLAPPING: Host 9C:02:98:C8:98:3D in vlan 303 is flapping between port Po4 and port Po5

Jan 4 11:54:08: %C4K_EBM-4-HOSTFLAPPING: Host 78:E3:B5:FD:50:99 in vlan 1 is flapping between port Gi1/4 and port Gi4/36

Jan 4 11:56:16: %C4K_EBM-4-HOSTFLAPPING: Host 78:E3:B5:FD:50:99 in vlan 1 is flapping between port Gi1/4 and port Gi4/36

Jan 4 11:57:23: %C4K_EBM-4-HOSTFLAPPING: Host 78:E3:B5:FD:50:99 in vlan 1 is flapping between port Gi1/4 and port Gi4/36

Jan 4 12:03:25: %C4K_EBM-4-HOSTFLAPPING: Host 78:E3:B5:FD:50:99 in vlan 1 is flapping between port Gi1/4 and port Gi4/36

Jan 4 12:03:27: %C4K_EBM-4-HOSTFLAPPING: Host 78:E3:B5:FD:50:99 in vlan 1 is flapping between port Gi1/4 and port Gi4/36

Jan 4 12:03:28: %C4K_EBM-4-HOSTFLAPPING: Host 78:E3:B5:FD:50:99 in vlan 1 is flapping between port Gi1/4 and port Gi4/36

Jan 4 12:09:21: %C4K_EBM-4-HOSTFLAPPING: Host 78:E3:B5:FD:50:99 in vlan 1 is flapping between port Gi1/4 and port Gi4/36

Jan 4 12:28:26: %C4K_EBM-4-HOSTFLAPPING: Host 58:17:0C:CF:4E:0C in vlan 303 is flapping between port Po5 and port Po4

Jan 4 12:35:51: %C4K_EBM-4-HOSTFLAPPING: Host 94:51:03:7D:A3:32 in vlan 303 is flapping between port Po5 and port Po4

Jan 4 13:06:03: %C4K_EBM-4-HOSTFLAPPING: Host 94:51:03:90:8E:51 in vlan 303 is flapping between port Po4 and port Po5

Jan 4 13:08:35: %C4K_EBM-4-HOSTFLAPPING: Host 94:51:03:90:8E:51 in vlan 303 is flapping between port Po5 and port Po4

Jan 4 13:08:59: %C4K_EBM-4-HOSTFLAPPING: Host 94:51:03:90:8E:51 in vlan 303 is flapping between port Po4 and port Po5

Jan 4 13:09:13: %C4K_EBM-4-HOSTFLAPPING: Host 94:51:03:90:8E:51 in vlan 303 is flapping between port Po4 and port Po5

Jan 4 13:12:04: %C4K_EBM-4-HOSTFLAPPING: Host 94:51:03:90:8E:51 in vlan 303 is flapping between port Po4 and port Po5

Jan 4 13:31:44: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:07:59 in vlan 303 is flapping between port Po4 and port Po5

Jan 4 13:43:28: %C4K_EBM-4-HOSTFLAPPING: Host 00:07:AB:FB:95:D8 in vlan 305 is flapping between port Po4 and port Po5

Jan 4 13:54:29: %C4K_EBM-4-HOSTFLAPPING: Host CC:05:1B:27:B7:55 in vlan 303 is flapping between port Po5 and port Po4

Jan 4 14:40:25: %C4K_EBM-4-HOSTFLAPPING: Host CC:F9:E8:4A:6F:E3 in vlan 303 is flapping between port Po4 and port Po5

Jan 4 14:49:39: %C4K_EBM-4-HOSTFLAPPING: Host CC:F9:E8:4A:6F:E3 in vlan 303 is flapping between port Po4 and port Po5

Jan 4 14:53:40: %C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 5 times)Packet received with invalid source MAC address (00:00:00:00:00:00) on port Gi1/4 in vlan 1

Jan 4 14:59:06: %C4K_EBM-4-HOSTFLAPPING: Host 1C:65:9D:21:64:36 in vlan 303 is flapping between port Po4 and port Po5

Jan 4 15:36:52: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po5 and port Po4

Jan 4 15:37:20: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po5 and port Po4

Jan 4 15:38:20: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po5 and port Po4

Jan 4 15:38:51: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po5 and port Po4

Jan 4 15:39:02: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po5 and port Po4

Jan 4 15:39:16: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po4 and port Po5

Jan 4 15:40:19: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po4 and port Po5

Jan 4 15:40:29: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po5 and port Po4

Jan 4 15:43:34: %C4K_EBM-4-HOSTFLAPPING: Host F0:08:F1:3B:6F:56 in vlan 305 is flapping between port Po5 and port Po4

Leo Laohoo · ‎01-04-2013

One of your switches has a mis-configured port channel. MAC addresses are looping to every switch.

Rolf Fischer · ‎01-05-2013

Hola Eduardo:

En este foro no todo el mundo sabe Español, por eso está mejor contestar en Inglés.

This syslog message is interesting too:

%C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 5 times)Packet received with invalid source MAC address (00:00:00:00:00:00) on port Gi1/4 in vlan 1

An all-zero MAC address is not valid as source.

This could be an indication of a misconfigured VMware environment. If you're running VMware, I'd start troubleshooting here.

It's unlike but perhaps worth mentioning: A couple of years ago I saw a non-Cisco switch generating BPDUs with an all-zero bridge-ID, which caused a continuous recalculation of the spannting-tree. Have you checked yet if ST topology is stable?

"show spanning-tree details | include exec|occur|from"

is a handy command to trace where topology changes came from.

Saludos,

Rolf