Windows 2003 SP2 keeps losing Network Connectivity.

[Frogbeef]

One of our ESXi VM, a Windows 2003 SP2 keeps losing Network Connectivity

Nothing appears in the vmware.log for that machine, no events.

Where do i start to investigate this behavior ?

Thanks!

[golddiggie]

Check the NIC properties within the VM to start with. Make sure the options to allow the server to power off the NIC is disabled. Hard code the DNS and gateway IP addresses, if not the entire IP configuration.

Are you using IP4 or IP6 on the VM? Do you have other VM's that are not having this issue? What does your ESXi host's networking configuration look like (how many NIC's, what kind, how configured)? What kind of network are you on?

Treat this just like the Windows server was on a physical box to start with, for troubleshooting.

VCP4

[Scissor]

Smells like a MAC address conflict. Was your win2003 Guest cloned/copied from an original Guest? If so, verify that it has a unique MAC address for its network card.

[golddiggie]

Is that what I was smelling? I thought it was last night's dinner...

You could also remove the network card from the VM and create a new one to see if that makes any difference. Just make sure to note the MAC address of the existing before you delete it and ensure that the new one doesn't use the same address.

VCP4

[Frogbeef]

Thanks Golddiggie and Scissors,

The MAC addresses were fine and the IP correct etc..

We have changed the Netadapter from VMXNET3 to EM1000 and the problem has not reoccured

Any ideas ??