Change DNS IP for VMs

Hi,

I would like to change my DNS IP to VMs of a particular folder.

Please help.

Get-VM $vms | Get-NetworkAdapter | Set-NetworkAdapter -NetworkName br1211 -Confirm:$false, Set-VMGuestNetworkInterface  -VMGuestNetworkInterface -DNS 172.25.255.5,172.25.255.6

The above scripts gives me a error.

-Madhu