Hello All,
Thanks for looking into it. I got it working, so thought to share with you if this is going to help for someone.
I was using wrong <Identifier> name, when used "Ethernet" I got the IP configured. But <NextHopAddress> didnt help with configuring gateway, i had to use a script added to the autounattend.xml like below
cmd.exe /c powershell -File a:\SetGateway.ps1
cat SetGateway.ps1
$nac = get-wmiobject Win32_NetworkAdapterConfiguration
$nac.SetGateways("gateway_IP",1)
This case can be archived.
Thanks
Shyam