Hello community friends!
I am troubleshooting a strange issue that I have never encountered before. On one of my 3 hosts I have a vSwitch (vSwitch1 in my case) that I am using for vMotion and iSCSI traffic. Well when I add a second 10GB uplink (vmnic1) vMotion fails at 21% but as soon as I remove it then vMotion starts working again. So, we know vmnic0 works just fine by itself but not with vmnic1. I tried it with just vmnic1 but vMotion does not work, still. something about vmnic1
Just to give a little background on the physical setup. Each of the 3 hosts have two 10GB NICs all running to a 10gb Netgear switch that also, has the SANs 10gb connections for shared storage access. The SANs and host are the only devices on the switch. NOTE: These switches predate me. I would have never choose these switches for a VMWare / EMC Unity cluster.
Thank you all for the quick responses
I resolved the issue. Here is how: 1) I removed vMotion from the VMKernal 2) Placed the host in maintenance mode 3) Rebooted the host 4) added vMotion back to the VMKernal port. vMotion is working like a charm.
I have a suspicion that after adding the second NIC that perhaps some vMotion related service stopped.