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IP Change, Can't Access ESXi VMs On Network

Posted on 2014-03-22
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Last Modified: 2014-03-27
Hi Experts

We are having to change the ip range on our network, due to running out of ip addresses.

The IPs have been changed on the ESXi hosts and they can be accessed across the network, but when changing the IP on any VM on any host, they can't be accessed from the network, they also can't see each other.

We are not currently running any vLans, we are running ESXi 5.5, the VMs are Windows 2012 DC.

The subnet and gateway has been changed, and all physical devices can be accessed and are working, I have tried removing the virtual NIC and re-adding it with no luck.

The vm does report a strange IP address under the VMware summary page in vSphere client, and the range on each NIC within vSphere still shows the old network, but it's my understanding this can't be changed as it is non editable and updates itself.

Any help is greatly appreciated, as currently all my virtual servers are down

Thanks

Jon
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Question by:Jon C
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Expert Comment

by:Vaseem Mohammed
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Hi,
In case of domain controller, try a restart after changing the IP.
When you are changing the IP address on VM, have you tried pinging the gateway IP?
Also, try to register the new IP address in DNS (ipconfig /registerdns)
DCdiag /Fix will take care of re-registering service records in DNS.
No sure if changing the portgroup will help but can give a try by creating a new VM portgroup and move the VM with changed IP to newly created PortGroup.
If you have an extra NIC on Host, try to create a new vSwitch and move the VM to new vSwitch.
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Jon C earned 0 total points
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Thanks for the reply, I had already tested your suggestions, after looking into the logs on the VMs, it said that there was an ip conflict for every ip, it also detailed the same MAC address on each error.
This was found to be an old Cisco switch on the network causing a conflict, once this was removed, everything started working
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Author Closing Comment

by:Jon C
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See post for resolution
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