Cisco Cisco Tunnel Terminating Gateway (TTG)

 

 

 

 

Activates and deactivates sessions.

 

l2tpdemux

 

L2TP Demultiplexor 
Task 

 

Created by the Session Controller when an LNS service is created. Only one 
L2TPDemux task is invoked for the entire system.

 

De-multiplexes and forwards new incoming tunnel create requests to L2TPMgrs.

 

Maintains information about current active tunnels in all L2TPMgrs.

 

Load balances requests among L2TPMgrs.

 

With session recovery (SR) enabled, this demux manager is usually established on one 
of the CPUs on the first active packet processing card.

 

l2tpmgr

 

Layer 2 Tunneling 
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.

 

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.

 

linkmgr

 

SS7 Link Manager 

 

Created by the Session Controller when the first SS7RD (routing domain) is 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.

 

magmgr

 

Mobile Access Gateway 
(MAG) Manager

 

Created by the Session Controller when the first MAG service is created in a 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.

 

Maintains the Binding Update List used to keep track of the mobile node’s bindings.

 

Originates PBU-based on trigger received from the Session Manager during error 
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.

 

Runs as a single instance.