def get_gateway(self, subnet):
<EOL>return str(netaddr.IPAddress(subnet) + <NUM_LIT:1>)<EOL>
Retrieve the Gateway associated with the subnet.

        Returns the Gateway associated with a subnet. This is also the Gateway
        address configured in the leaf switch or ToR. This value is subnet + 1.
        The Gateway created in Openstack is + 2, which is also the FW's IN
        interface address and DCNM's service node IP address.