Session Subsystem
Table 51: Session Subsystem Tasks
Function
Description
Task
Created at StarOS start-up. Only one Session Controller
instantiated in the system at any time.
Session Controller
sessctrl
Acts as the primary point of contact for the Session
Subsystem. Since it is aware of the other subsystems running
within the system, the Session Controller acts as a proxy for
the other components, or tasks, that make up the subsystem.
Starts, configures, and coordinates the efforts of the Session
Processing Subsystem sub-managers.
Works with Resource Manager to start new Session Managers
when all existing Session Managers exceed their capacity.
Receives context information from VPN Managers.
Distributes IP interface address information to other Session
Processing Subsystem sub-managers.
Manages Enhanced Charging Service (ECS), Content
Filtering and URL Blacklisting services.
Created by the Session Controller.
Session Manager
sessmgr
Provides a subscriber processing system that supports
multiple session types.
Multiple Session Managers can run on a single CPU and/or
can be distributed throughout any CPU present in the system.
A single Session Manager can service sessions from multiple
A11 Managers, and from multiple contexts.
Processes protocols for A10/A11, GRE, R3, R4, R6,
GTPU/GTPC, PPP, and Mobile IP.
Manages Enhanced Charging Service, Content Filtering and
URL Blacklisting services.
Session Managers are paired with AAA Managers.
ASR 5000 System Administration Guide, StarOS Release 21.1
382
StarOS Tasks
Session Subsystem
Summary of Contents for ASR 5000
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