Cisco ASR 5000 Administration Manual page 414

Session Subsystem
Task
egtpimgr
gtpcmgr
gtpumgr
ASR 5000 System Administration Guide, StarOS Release 21.1
386
Description Function
Enhanced GPRS Created by Session Controller for each context in which an
Tunneling Protocol egtp-service of interface type sgw-ingress or pgw-ingress is
Ingress Manager configured.
Receives EGTP sessions from MME/S4 SGSN/SGW and
distributes them to different Session Manager tasks for load
balancing.
Maintains list of current EGTP sessions.
Maintains list of current Session Manager tasks which aids
in session recovery.
Handles GTP Echo messaging.
With session recovery (SR) enabled, this demux manager is
usually established on one of the CPUs on the first active
packet processing card.
GPRS Tunneling Created by the Session Controller for each context in which
Protocol Control a GGSN service is configured.
(GTP-C) Message
Receives the GTP sessions from the SGSN and distributes
Manager
them to different Session Manager tasks for load balancing.
Maintains a list of current Session Manager tasks to aid in
system recovery.
Verifies validity of GTPC messages.
Maintains a list of current GTPC sessions.
Handles GTPC Echo messaging to/from SGSN.
GPRS Tunneling Created by the Session Controller for each context in which
Protocol User (GTP-U a GTPU service is configured. Supported for both GTPUv0
Manager and GTPUv1
Maintains a list of the GTPU-services available within the
context and performs load-balancing (of only Error-Ind) for
them.
Supports GTPU Echo handling.
Provides Path Failure detection on no response for GTPU
echo.
Receives Error-Ind and demuxes it to a particular Session
Manager.
Serves as the Default GTPU listener. GTPUMGR will process
GTPU packets with invalid TEID.
With session recovery (SR) enabled, this demux manager is
usually established on one of the CPUs on the first active
packet processing card.
StarOS Tasks