Hi
I was able to get this sorted, it looks like incase of vm’s in KVM the nic speed is not reported which causes this issue, i was trying the vyos as a virtual instance in KVM. to fix this i had to change the command as below.
cfgmaker --global ‘options[_]: bits,growright’ --snmp-options=::::2 --zero-speed=1000000000 public@100.64.16.42 > vyos.cfg