Cisco ASR 5000 Series Administration Manual page 431

StarOS Tasks
Task Description
hnbmgr Home NodeB (HNB) Manager
imsimgr International Mobile
Subscriber Identity Manager
for MME
imsimgr International Mobile
Subscriber Identity Manager
for SGSN
Function
Starts when an HNB-GW service configuration is detected. There can be
multiple instances of this task for load sharing. All HNB Managers have
all the Active HNB-GW Services configured and be identical in
configuration and capabilities.
Runs the SCTP protocol stack.
Handles the SCTP associations.
Maintains Home-NodeB databases.
Provides nodal functions for Iuh interface on SCTP protocol.
With session recovery (SR) enabled, this manager is usually established
on one of the CPUs on the first active packet processing card.
Starts when an MME service configuration is detected. There is only one
instance of this task:
Selects which SessMgr to use for new subscriber sessions.
Maintains and reports MME-related demux statistics on events like Attach
by IMSI, Attach by GUTI, etc.
Can interact with the following tasks in the system:
- Session Controller
- MME Manager
- Session Manager
With session recovery (SR) enabled, this demux manager is usually
established on one of the CPUs on the first active packet processing card.
Started by the Session Controller.
Selects SessMgr, when not done by linkmgr or sgtpcmgr tasks, for calls
sessions based on IMSI/P-TMSI.
Load-balances across SessMgrs to select one to which a subscriber will
be assigned.
Maintains records for all subscribers on the system.
Maintains mapping between the IMSI/P-TMSI and SessMgrs.
With session recovery (SR) enabled, this demux manager is usually
established on one of the CPUs on the first active demux packet processing
card.
ASR 5500 System Administration Guide, StarOS Release 21.4
Session Subsystem
399