Controllers And Managers - Cisco ASR 5000 Series Administration Manual

StarOS Tasks
• Card/Slot/Port (CSP): Coordinates the events that occur when any card is inserted, locked, unlocked,
• Session Manager (SM): Performs high-touch processing of mobile subscribers' packet-oriented data

Controllers and Managers

Many of the primary subsystems are composed of controller tasks called Controllers, and subordinated tasks
called Managers.
Controllers serve several purposes:
• Monitor the state of their Managers and allow communication between Managers within the same
• Enable inter-subsystem communication since they can communicate with the controllers of other
• Mask the distributed nature of the software from the user allowing for ease of management.
Managers manage resources and mappings between resources. In addition, some managers are directly
responsible for call processing.
For information about the primary subsystems that are composed of critical, controller, and /or manager tasks,
see Subsystem Tasks, on page
• Per-interface packet filtering
• Traffic management and traffic engineering
• Passing user data frames to/from packet processing CPUs
• Modifying, adding, or stripping datalink/network layer headers
• Recalculating checksums
• Maintaining statistics
• Managing external Ethernet interfaces
removed, shutdown, or migrated. CSP also performs auto-discovery and configures ports on a
newly-inserted interface card. It determines how interface cards map to packet processing cards.
The CSP subsystem runs only on the active management card and synchronizes the information it
contains with the SCT subsystem on the standby management card. It is started by the SIT subsystem
and monitored by the HAT subsystem.
session flows. High-touch user data processing consists of the following:
• Payload transformation
• Filtering and scheduling
• Statistics collection
• Policing
subsystem.
subsystems.
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ASR 5500 System Administration Guide, StarOS Release 21.4
Controllers and Managers
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