Output only. Output Only Port pair remote location constraints, which can take one
of the following values: PORT_PAIR_UNCONSTRAINED_REMOTE_LOCATION,
PORT_PAIR_MATCHING_REMOTE_LOCATION.
Output only. Output Only Port pair VLAN constraints, which can take one of the
following values: PORT_PAIR_UNCONSTRAINED_VLAN, PORT_PAIR_MATCHING_VLAN
Check the PortPairVlan enum for the list of possible values.