Over the past week, I upgraded 10 hosts in a cluster from ESXi 5.1 to v5.5 Update 1. Everything seemed to go well. The past weekend was Windows patching weekend so, all of our servers rebooted....
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Over the past week, I upgraded 10 hosts in a cluster from ESXi 5.1 to v5.5 Update 1. Everything seemed to go well. The past weekend was Windows patching weekend so, all of our servers rebooted. About 80 of the 350 VMs in the cluster lost their NIC in the OS. To fix the issue, I had to do a repair of VMware tools which brought the NIC back. Then, I had to retype all the static IP address information. What a pain. Since I upgraded the underlying host to 5.5 and, the VMs all said VMware tools were current before I did the repair, I am assuming that tools was upgraded when the VM rebooted however, I don't see anything in the logs to that effect. If the VM is set to upgraded on power on, would that show up in tasks and events? Almost all of the VMs were Windows 2008 R2 but, there were a couple 2003. Hardware versions were 7, 8, and 9 Almost all the NICs were VMXNET3 but there were a couple of E1000 on the Server 2003 VMs A couple of months ago we upgraded about 8 hosts in our test cluster to v5.5. Since that time, the VMs in test have all rebooted at least twice for patching with no issues. Any ideas?