Problem with MAC pinning and new VLAN

[Cross Announces nexus 1000V and forums of the UCS]

Hi all, I have a working of the UCS 1.4 configuration (3i) and the Nexus 1000V 1.4 and according to best practices guide uses "channel-group auto on mac - pinning mode" on the uplink of Nexus. I have a problem when you add a new VLAN in this environment, and it is a reproducible problem in two different facilities.

I pass by the VLAN usual creation process on the Nexus, the network upstream and within the UCS himself. I create new port vethernet profile and set it as an access port in the new VIRTUAL LAN. However when I join a VM (existing or new) to this new port vethernet profile in vCentre virtual machine cannot communicate with anything. However, if I disable MAC pinning with 'no channel-group auto on mac - pinning mode', the virtual machine will start instantly talk to the outside world and the new VIRTUAL LAN is running. Can I turn MAC pinning back once again, and everything continues to work.

So the question is, is this normal or is there a problem? MAC the Θtiquetage has a brief interruption of the uplink, so is not a viable long-term customer solution when they want to add new VLAN. Is it possible to add new VLANS in this scenario without any unavailability of the network, but brief?

Thank you

Close the loop on this.  You tap the CSCto00715bug.

Symptom: New MAC address is not learn on vem in the l2 table even though the mac address table is not overflow yet. vemcmd show l2-emergency-aging-stats | grep "Number of entries that could not be inserted:" will show extreme large number. Conditions: Nexus1000v VEM running on SV1.4 release. There are two CPU cores on the host. This issue may happen at race condition. Workaround: Reboot the ESX/ESXi host. 

This problem is corrected in the 1. 4A release.

Kind regards

Robert

Tags: Cisco DataCenter

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