Hi Anand,
The servers i have attached to this switch are quad node chassis. The uplinks are using connect-x 2 adapters.
The servers are running hyper-v. The connect-x 2 is configured as a vswitch with no management access. So all traffic from the vm's is tagged. The only time a vm is untagged is if we are monitoring the network.
The error that appeared was traffic from a vm tagged for 2 recieved an ip address back thats in the default vlan only.
Looking at the switch the mac address was in vlan 2 and the untagged vlan which should not happen.
There seems to be a layer 2 issue here as the machines tagged for 3 or higher werent suffereing from this problem.
Rob
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