Session Subsystem - Cisco ASR 5000 Series Administration Manual

Session Subsystem

Session Subsystem
Table 51: Session Subsystem Tasks
Task Description
sessctrl Session Controller
sessmgr Session Manager
ASR 5500 System Administration Guide, StarOS Release 21.4
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Function
Created at StarOS start-up. Only one Session Controller instantiated in
the system at any time.
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.
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.
StarOS Tasks