Cisco Cisco Packet Data Interworking Function (PDIF)
StarOS Tasks
▀ Subsystem Tasks
▄ VPC-VSM System Administration Guide, StarOS Release 19
312
Task
Description
Function
Provides recovery services to the NPU Controller.
npuctrl
NPU Controller
Created at StarOS start-up. Only one NPU Controller operates in the system at any
time.
time.
Monitors the state of NPU Managers in the system.
Registers to receive notifications when NPU Manager crashes.
Controls recovery operation.
Provides a centralized location for CLI commands related to NPU Manager state.
npumgr
NPU Manager
Created for every packet processing card that is installed and started.
Provides port configuration services to the CSP task.
Provides interface binding and forwarding services to the VPN Manager.
Provides flow insertion and removal services to Session Manager and AAA Manager
tasks.
tasks.
Provides recovery services to the NPU Controller.
npusim
NPU Simulator
[ASR 5500]
[ASR 5500]
Created for every DPC installed and started.
Provides port configuration services to the CSP task
Provides interface binding and forwarding services to the VPN Manager.
Provides flow insertion and removal services to Session Manager and AAA Manager
tasks.
tasks.
Provides recovery services to the NPU Controller.
Session Subsystem
Table 19.
Session Subsystem Tasks
Task
Description
Function
sessctrl
Session Controller
Created at StarOS start-up. Only one Session Controller instantiated in the system at
any time.
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.
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.
managers.
Works with Resource Manager to start new Session Managers when all existing Session
Managers exceed their capacity.
Managers exceed their capacity.