Function
Description
Task
Created by Session Controller for each context in which an
egtp-service of interface type sgw-ingress or pgw-ingress is
configured.
Enhanced GPRS
Tunneling Protocol
Ingress Manager
egtpimgr
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.
Created by the Session Controller for each context in which
a GGSN service is configured.
GPRS Tunneling
Protocol Control
(GTP-C) Message
Manager
gtpcmgr
Receives the GTP sessions from the SGSN and distributes
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.
Created by the Session Controller for each context in which
a GTPU service is configured. Supported for both GTPUv0
and GTPUv1
GPRS Tunneling
Protocol User (GTP-U
Manager
gtpumgr
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.
ASR 5000 System Administration Guide, StarOS Release 21.1
386
StarOS Tasks
Session Subsystem
Summary of Contents for ASR 5000
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