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02-02-2010 05:24 AM
02-02-2010 05:24 AM
MAC address flapping
Hi All,
I am having some issue with my connectivity.
The setup is as below:
Server A NIC 1 -- VC 1 -- Switch A
NIC 2 -- VC 2 -- Switch A
Server B NIC 1 -- VC 1 -- Switch A
NIC 2 -- VC 2 -- Switch A
The VLAN configuration are done on individual NIC card on the servers and the switchport on Switch A facing the VC connect are all on trunk mode.
Currently I am seeing MAC address flapping on my Switch. The switches are CISCO 3750 and are being stacked so it appears logically as 1 switch.
Any idea what might be the problem?
Below is an output of the flapping on the switch.
%SW_MATM-4-MACFLAP_NOTIF: Host xxxx.xxxx.0637 in vlan 1 is flapping between port Gi2/0/3 and port Gi2/0/5
%SW_MATM-4-MACFLAP_NOTIF: Host xxxx.xxxx.46eb in vlan 1 is flapping between port Gi1/0/5 and port Gi1/0/7
%SW_MATM-4-MACFLAP_NOTIF: Host xxxx.xxxx.661d in vlan 1 is flapping between port Gi2/0/15 and port Gi2/0/7
I am having some issue with my connectivity.
The setup is as below:
Server A NIC 1 -- VC 1 -- Switch A
NIC 2 -- VC 2 -- Switch A
Server B NIC 1 -- VC 1 -- Switch A
NIC 2 -- VC 2 -- Switch A
The VLAN configuration are done on individual NIC card on the servers and the switchport on Switch A facing the VC connect are all on trunk mode.
Currently I am seeing MAC address flapping on my Switch. The switches are CISCO 3750 and are being stacked so it appears logically as 1 switch.
Any idea what might be the problem?
Below is an output of the flapping on the switch.
%SW_MATM-4-MACFLAP_NOTIF: Host xxxx.xxxx.0637 in vlan 1 is flapping between port Gi2/0/3 and port Gi2/0/5
%SW_MATM-4-MACFLAP_NOTIF: Host xxxx.xxxx.46eb in vlan 1 is flapping between port Gi1/0/5 and port Gi1/0/7
%SW_MATM-4-MACFLAP_NOTIF: Host xxxx.xxxx.661d in vlan 1 is flapping between port Gi2/0/15 and port Gi2/0/7
1 REPLY 1
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02-02-2010 06:19 PM
02-02-2010 06:19 PM
Re: MAC address flapping
Apparently the mac address are from the stacking link between the virtual connects.
How can I solve this?
How can I solve this?
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