network issue

Hello,

I have setup two HyperV server. each have two NIC. One NIC is connected directly from one server to other server No router in between that. And another NIC is connected to External network.

Now I have created two  External Vswitch one is with External network and other one is internal network.

now problem is if i assign two vswitch two one Linux vms i can not ping public ip address which is assign to vm.

Please help

Partha