Home > VMware > Virtual Machine Drops Packet Intermittently

Virtual Machine Drops Packet Intermittently

Recently we had an issue in one of our HA/DRS Clusters running vSphere 4.0 wherein random Virtual machines had intermittent packet drops. We tried migrating the Virtual Machine to different hosts within the cluster but we continued to face the issue on random VM’s on all of the hosts. We verified at the Physical switch , tried replacing the cables and continued to monitor all VMs.We realized that this was not an issue with the Server hardware or the Physical Switches since there were packets drops all of a sudden on random VMs in the cluster.

Being a big fan of VMware KB tried searching through VMware KB portal  and found an interesting KB1017755 on similar issue.

Quickly scanned through VMkernel log file of the hosts and found the below entries

NMP: nmp_DeviceAttemptFailover: Retry world failover device “naa._______________” – failed to issue command due to Not found (APD)

As per the KB article we upgraded our hosts to ESX 4.0 Build 219382 and the issue got resolved. There were no packet drops on the Virtual Machines !!

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Categories: VMware Tags: , ,
  1. February 8, 2011 at 11:00 pm

    Great to see you taking advantage of our Knowledgebase!

  2. February 8, 2011 at 11:02 pm

    Thanks and You guys are doing a great job in updating the KB.

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