We are running ESXi5.5 1331829 - single cluster 7 hosts and vCenter 5,5 build 1476327. Some guest VMs are Losing network connection randomly. Multiple OS's (Windows 2012 r2, Windows 2008 R2, Windows 2003) and different ESXi hosts (all running the same ESXi version). The connectivity comes back by either rebooting the guest VM or by enabling disabling the network card.
1.) At random VMs experience loss of network connectivity. The symptoms appear to be similar even though the versions are different. This is happening on ESXi 5.1 our production is running 5.5
The second issue we have seen is a little different where we have the following issue:
2.) After a reboot of a Windows 2012 R2 the VMs are getting a 169.254.X IP address. This issue seems to be documented in the VMware KB.
Can anyone provide any advice?