{hscale=1}
sgsn =	SGSN
	123.44.0.9
sgwc =	SGW-C
	123.44.0.5
sgwu =	SGW-U
	123.44.0.6
pgwc =	PGW-C
	123.44.0.7
pgwu =	PGW-U
	123.44.0.8

sgsn <-> sgwc	S4-C GTPv2-C
sgwc <-> sgwu	Sxa PFCP
sgsn <-> sgwu	S4-U GTPv1-U
sgwc <-> pgwc	S5-C GTPv2-C
pgwc <-> pgwu	Sxb PFCP
sgwu <-> pgwu	S5-U GTPv1-U

...

sgsn -> sgwc	GTP Create Session Request
sgsn [] sgwc	F-TEID S11 = 123.44.0.9,0x004
		F-TEID S5 = 123.44.0.7,0x000
		PDN addr alloc = IPv4 192.168.100.2

|||
|||

sgwc -> sgwu	PFCP Session Establishment Request
sgwc [] sgwu	2x Create PDR
		F-TEID = CHOOSE
		FAR = NOCP,BUFF

|||
|||

sgwc <- sgwu	PFCP Session Establishment Response
sgwc [] sgwu	Created PDR F-TEID 123.44.0.6,0x015
		Created PDR F-TEID 123.44.0.6,0x016

|||
|||

sgwc -> pgwc	GTP Create Session Request
sgwc [] pgwc	F-TEID S5 = 123.44.0.5,0x00b
		PDN addr alloc = IPv4 192.168.100.2
		Bearer Ctx: F-TEID S5 = 123.44.0.6,0x015

|||
|||

pgwc -> pgwu	PFCP Session Establishment Request
pgwc [] pgwu	Create PDR 1:
		PDI: src-iface Core, UE IPv4 192.168.100.2
		FAR-1: FORW, dst-iface Access,
		hdr creation: GTP-U 123.44.0.6,0x015

		Create PDR 2:
		PDI: src-iface Access, F-TEID = CHOOSE id:05
		hdr removal: GTP-U
		FAR-2: FORW, dst-iface Core

		Create PDR 3:
		PDI: src-iface CP-function, F-TEID = CHOOSE
		hdr removal: GTP-U
		FAR-1

		Create PDR 4:
		PDI: src-iface Access, F-TEID = CHOOSE id:05, SDF Filter
		hdr removal: GTP-U
		FAR-3: FORW, dst-iface CP-Function,
		hdr creation: GTP-U 123.44.0.7,0x00b

|||

pgwc <- pgwu	PFCP Session Establishment Response
pgwc [] pgwu	Created PDR-1
		Created PDR-2: F-TEID = 123.44.0.8,0x01e
		Created PDR-3: F-TEID = 123.44.0.8,0x01f
		Created PDR-4: F-TEID = 123.44.0.8,0x01e

|||
|||

sgwc <- pgwc	GTP Create Session Response
sgwc [] pgwc	TEID: 0x00b
		F-TEID: 123.44.0.7,0x00b
		PDN Addr: 192.168.100.2
		Bearer Ctx: F-TEID S5 123.44.0.8,0x01e

|||
|||

sgwc -> sgwu	PFCP Session Modification Request
sgwc [] sgwu	Update FAR-2: FORW, dst-iface Core,
		hdr creation GTP-U 123.44.0.8,0x01e

|||

sgwc <- sgwu	PFCP Session Modification Response

|||
|||

sgsn <- sgwc	GTP Create Session Response
sgsn [] sgwc	TEID: 0x004
		F-TEID S11/S4: 123.44.0.5,0x007
		F-TEID S5/S8: 123.44.0.7,0x00b
		PDN Addr: 192.168.100.2
		Bearer Ctx:
		F-TEID S1-U: 123.44.0.6,0x016
		F-TEID S5/S8: 123.44.0.8,0x01e

|||
|||

sgsn -> sgwc	GTP Modify Bearer Request
sgsn [] sgwc	TEID: 0x007
		Bearer Ctx:
		F-TEID S1-U: 192.168.104.167,0x32adb2ad

|||
|||

sgwc -> sgwu	PFCP Session Modification Request
sgwc [] sgwu	Update FAR-1: FORW, dst-iface Access,
		hdr creation: GTP-U 192.168.104.167,0x32adb2ad

|||
|||


sgwc <- sgwu	PFCP Session Modification Response

|||

sgsn <- sgwc	GTP Modify Bearer Response
sgsn [] sgwc	TEID: 0x004
		Bearer Ctx:
		F-TEID S1-U: 192.168.104.167,0x32adb2ad