Cisco Cisco Packet Data Gateway (PDG) Guida Alla Risoluzione Dei Problemi
System Software Task and Subsystem Descriptions
Primary Subsystem Composition ▀
Cisco ASR 5000 Series System Administration Guide ▄
OL-22969-02
Task
Description
Card
CPU
w/o SR
w/ SR
w/o SR
w/ SR
Layer 2 Tunneling
Protocol Manager
(L2TPMGR)
Protocol Manager
(L2TPMGR)
Created by the Session Controller for each
context in which a LAC or LNS service is
configured (additional Managers created as
needed depending on loading), the L2TP
Manager task performs the following
functions:
context in which a LAC or LNS service is
configured (additional Managers created as
needed depending on loading), the L2TP
Manager task performs the following
functions:
L2TP processing
Maintaining protocol state machines
for all L2TP sessions and tunnels
for all L2TP sessions and tunnels
Triggering IPSec encryption for new
L2TP tunnels as needed
L2TP tunnels as needed
Working with Session Managers to
gracefully bring down tunnels
gracefully bring down tunnels
Important:
For ST16s with
session recovery enabled, this
demux manager is usually
established on one of the CPUs on
the first active PAC.
demux manager is usually
established on one of the CPUs on
the first active PAC.
Active PACs
1st PAC
0
Any (see
NOTE)
NOTE)
L2TP
Demultiplexor
Task
(L2TPDEMUX)
Demultiplexor
Task
(L2TPDEMUX)
Created by the Session Controller when a
LNS service is created, only one L2TPDemux
task is invoked for the entire system. This
task performs the following functions:
LNS service is created, only one L2TPDemux
task is invoked for the entire system. This
task performs the following functions:
De-multiplexes and forwards new
incoming tunnel create requests to
L2TPMgrs
incoming tunnel create requests to
L2TPMgrs
Maintains information about current
active tunnels in all L2TPMgrs
active tunnels in all L2TPMgrs
Load balances requests among
L2TPMgrs
L2TPMgrs
Important:
For ST16s with
session recovery enabled, this
demux manager is usually
established on one of the CPUs on
the 1st active PAC.
demux manager is usually
established on one of the CPUs on
the 1st active PAC.
Active PACs
1st PAC
0
Any (see
NOTE)
NOTE)