Unable to connect to the MKS: Could not connect to pipe

2 of my VMs at the lab were ping-able but cannot ssh or telnet in. Looking at the console in the VMs, it showed the following error. Other VMs in the same ESX Host were fine just these 2 were having ssh issues.

Put the ESX host on Maintanence mode then rebooted the hosts everything came back up fine. I was told, the switch was having issue recently.