Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

4506 - Host flapping - C4K_EBM-4-HOSTFLAPPING

Hello to forum,

I have network with 100 switches - 8x L3 switches with 10G ring.

On main L3 switch is logged a lot of host flapping issues - more than 4500 in a day.

Main switch version:

Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.02.00.SG RELEASE SOFTWARE (fc4)

For example:

show logging

Oct 23 12:33:43: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:33:44: %C4K_EBM-4-HOSTFLAPPING: Host 20:02:AF:BA:8A:34 in vlan 119 is moving from port Po3 to port Po4

Oct 23 12:33:48: %C4K_EBM-4-HOSTFLAPPING: Host DC:2B:61:03:CA:C1 in vlan 119 is moving from port Po4 to port Po3

Oct 23 12:33:48: %C4K_EBM-4-HOSTFLAPPING: Host 50:CC:F8:4C:77:F4 in vlan 119 is moving from port Po4 to port Po3

Oct 23 12:33:49: %C4K_EBM-4-HOSTFLAPPING: Host 50:CC:F8:4C:77:F4 in vlan 119 is moving from port Po3 to port Po4

Oct 23 12:33:52: %C4K_EBM-4-HOSTFLAPPING: Host 14:5A:05:F2:10:7A in vlan 118 is moving from port Po3 to port Po4

Oct 23 12:34:00: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:34:00: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:34:03: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:34:06: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:34:09: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:34:15: %C4K_EBM-4-HOSTFLAPPING: Host 70:73:CB:67:8C:E0 in vlan 118 is moving from port Po3 to port Po4

Oct 23 12:34:16: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:34:18: %C4K_EBM-4-HOSTFLAPPING: Host 5C:0A:5B:3A:83:CE in vlan 202 is moving from port Po4 to port Po3

Oct 23 12:34:23: %C4K_EBM-4-HOSTFLAPPING: Host 00:26:52:53:3C:C0 in vlan 1 is moving from port Gi2/6 to port Te1/1

Oct 23 12:34:23: %C4K_EBM-4-HOSTFLAPPING: Host 00:26:52:53:3C:C0 in vlan 1 is moving from port Te1/1 to port Gi2/6

Oct 23 12:34:40: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:34:48: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:34:57: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:35:04: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:35:13: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:35:14: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:35:14: %C4K_EBM-4-HOSTFLAPPING: Host D8:57:EF:F9:67:C1 in vlan 118 is moving from port Po3 to port Po4

Oct 23 12:35:16: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:35:22: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:35:40: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:35:45: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:35:47: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:35:47: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:35:48: %C4K_EBM-4-HOSTFLAPPING: Host 9C:04:EB:98:A4:23 in vlan 119 is moving from port Po3 to port Po4

Oct 23 12:35:50: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:35:51: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:36:03: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:36:03: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:36:08: %C4K_EBM-4-HOSTFLAPPING: Host 40:B3:95:3D:9E:BB in vlan 119 is moving from port Po3 to port Po4

Oct 23 12:36:20: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:36:21: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

Oct 23 12:36:21: %C4K_EBM-4-HOSTFLAPPING: Host 20:54:76:1E:E4:0C in vlan 118 is moving from port Po3 to port Po4

Oct 23 12:36:21: %C4K_EBM-4-HOSTFLAPPING: Host D8:57:EF:F9:67:C1 in vlan 118 is moving from port Po4 to port Po3

Oct 23 12:36:23: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Te1/1 to port Gi2/9

Oct 23 12:36:24: %C4K_EBM-4-HOSTFLAPPING: Host 00:24:8C:B9:05:C7 in vlan 2 is moving from port Gi2/9 to port Te1/1

******************************

I think, that cannot be problem with loop some PCs in network, maybe some STP problem - or SW bug in IOS?

Anybody can help with this?

Best Regards,

Stepan

252
Views
0
Helpful
0
Replies