The value of tmnxMobPdnPcTnlRemoteCtrlAddr indicates the IP address of
the Serving Gateway (SGW) currently used for sending the control
plane signaling on S5 or S8 reference point when the value of
tmnxMobPdnPcSigProtocol is 'gtp'.
The value of tmnxMobPdnPcTnlRemoteCtrlAddr indicates the IP address
of the Mobile Access Gateway (MAG) currently used for sending the control
plane signal on S2a reference point when the value of tmnxMobPdnPcSigProtocol
is 'pmip'.