HyperV only allowing 1 guest to access the default gateway at one time

Hello

We have a 2012R2 Standard HyperV Server with 4 NIC's in a Team.

There is a Virtual Switch using the "Teamed" Adaptor.

The HyperV Host has two guest operating systems.

Server1 is able to ping the default gateway and access the internet until Server2 is rebooted. Then server1 can not ping the default gateway or access the internet until it is rebooted then Server2 cannot access the internet or ping the default gateway.

Both servers can ping themselves fine.

We have gone over the configuration of the router with SonicWall who have advised that it is not a SonicWall issue as the packets are not been received by the SonicWall.

Any help would be very much appreciated.