The value of tmnxMobPdnPcTnlRemV6CtrlAddr indicates the IPv6 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 IPv6 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'.