How to access a VIO network in vSphere environment?

Hi,

I am trying to access a VXLAN network that I created in VIO from vSphere environment.

I am just adding an interface to the VM in vSphere and adding the VIO network. After adding the VIO network I am modifying the IP details like IP address, gateway and subnet.

When I am trying to ping to the gateway from the vSphere VM, I am unable to get any response to the ICMP request.

Question - How can I access a VIO network in vSphere environment?

Question - Is it possible to add an external network as a subnet to a router ?  I am only able to set an external network's gateway (that I created as a portgroup in vSphere) to the VIO router. Any information on the above will be very helpful

Thanks

Ratnajit