Verify that GDP packets can be sent by the controller.

• Connect ATE port-1 to DUT port-1, and ATE port-2 to DUT port-2.
• Enable the P4RT server on the device.
• Connect two P4RT clients in a master/secondary configuration.
• Configure the forwarding pipeline and install the P4RT table entry required for GDP.
• Send a GDP packet from the master with egress_singleton_port set to one of the connected interfaces.
• Verify that the GDP packet is received on the ATE port connected to the indicated interface.
• Repeat sending the packet in the same way but from the secondary connection.
• Verify that the packet is not received on the ATE.

rpcs:
  gnmi:
    gNMI.Get:
    gNMI.Set:
    gNMI.Subscribe:

vRX if the vendor implementation supports FIB-ACK simulation, otherwise FFF.