- The problem might be due to the fact that the Nexus 7010s are still expecting to learn dynamic MAC addresses using Fabricpath, even though the 7004s are now using classical ethernet. This is because the 7010s are not aware that the 7004s have been changed to classical ethernet.
To fix this issue, you need to clear the MAC address table on the 7010s and then re-enable MAC learning. You can do this by running the following commands:
clear mac address-table
spanning-tree vlan 1-4094 forward
Once you have cleared the MAC address table and re-enabled MAC learning, the 7010s should start learning dynamic MAC addresses from the 7004s.
You can also check the following syslog messages to see if there are any errors related to MAC learning:
%L2FM-5-MAC_MOVE: MAC move detected for VLAN 100 from interface Ethernet1/1 to interface Ethernet1/2
%L2FM-5-MAC_LEARN_DISABLED: MAC learning disabled for VLAN 100 due to MAC move storm
If you see any of these messages, it means that MAC learning is being disabled on the 7010s due to a MAC move storm. This can happen if there are a lot of MAC moves in a short period of time. To prevent this, you can configure the mac move notification command to be logged at level 5. This will generate a syslog message for each MAC move, which will help you to identify the source of the problem.
M.
-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '
