Cisco Cisco Tunnel Terminating Gateway (TTG)
StarOS Tasks
Subsystem Tasks ▀
ASR 5000 System Administration Guide, StarOS Release 17 ▄
389
Task
Description
Function
l2tpmgr
Layer 2 Tunneling
Protocol Manager
Protocol Manager
Created by the Session Controller for each context in which a LAC or LNS service
is configured. Additional managers are created as needed depending on loading.
is configured. Additional managers are created as needed depending on loading.
Responsible for all aspects of L2TP processing.
Maintains protocol state machines for all L2TP sessions and tunnels.
Triggers IPSec encryption for new L2TP tunnels as needed.
Works with Session Managers to gracefully bring down tunnels.
With session recovery (SR) enabled, this demux manager is usually established on
one of the CPUs on the first active packet processing card.
one of the CPUs on the first active packet processing card.
linkmgr
SS7 Link Manager
Created by the Session Controller when the first SS7RD (routing domain) is
activated.
activated.
Multi-instanced for redundancy and scaling purposes.
Provides SS7 and Gb connectivity to the platform.
Routes per subscriber signalling across the SS7 (including Iu) and Gb interfaces to
the SessMgr.
the SessMgr.
magmgr
Mobile Access
Gateway (MAG)
Manager
Gateway (MAG)
Manager
Created by the Session Controller when the first MAG service is created in a
context.
context.
Sends and receives PMIP control messages (PBU/PBA).
Adds an NPU flow to receive MIPv6 PBA packets. This flow is identical to the
flow used in the HAMgr.
flow used in the HAMgr.
Maintains the Binding Update List used to keep track of the mobile node’s
bindings.
bindings.
Originates PBU-based on trigger received from the Session Manager during error
conditions.
conditions.
Receives PBA and forwards it to Session Manager.
Supports debugging facility – “magmgr” and “mobile-ipv6”.
mmgr
SGSN Master Manager
Created upon provisioning of SS7RDs/SCCP-NWs/etc. The Session Controller
provides the initial system configuration which includes a detailed description of
each distributed protocol layer, its resources sets, and a list of its service user
protocol layers and service provider protocol layers.
provides the initial system configuration which includes a detailed description of
each distributed protocol layer, its resources sets, and a list of its service user
protocol layers and service provider protocol layers.
Runs as a single instance.
Handles nodal SS7, Iu, and Gb functionality.
Implements master linkmgr functionality for SS7 route status aggregation.
Implements master linkmgr functionality for RNC and BSC status aggregation.
With session recovery (SR) enabled, this demux manager is usually established on
one of the CPUs on the first active demux packet processing card.
one of the CPUs on the first active demux packet processing card.