UPF2_in : (Z,A)                           -> UPF2 maps the flow with
                                             <C1, S1, SRGW::TEID,gNB>
UPF2_out: (U2::1, C1)(gNB, SRGW::TEID, S1; SL=3)(Z,A) -> H.Encaps.Red
C1_out  : (U2::1, S1)(gNB, SRGW::TEID, S1; SL=2)(Z,A)
S1_out  : (U2::1, SRGW::TEID)(gNB, SRGW::TEID, S1, SL=1)(Z,A)
SRGW_out: (SRGW, gNB)(GTP: TEID=T)(Z,A)   -> SRGW/96 is End.M.GTP6.E
gNB_out : (Z,A)