Cisco Cisco Tunnel Terminating Gateway (TTG)
StarOS Tasks
Subsystem Tasks ▀
ASR 5000 System Administration Guide, StarOS Release 17 ▄
391
Task
Description
Function
sgtpcmgr
SGSN GPRS Tunneling
Protocol Control
message Manager
Protocol Control
message Manager
Created by the Session Controller for each VPN context in which an SGSN service
is configured.
is configured.
Terminates Gn/Gp and GTP-U interfaces from peer GGSNs and SGSNs for SGSN
Services.
Services.
Terminates GTP-U interfaces from RNCs for IuPS Services.
Controls standard ports for GTP-C and GTP-U.
Processes and distributes GTP-traffic received from peers on these ports.
Performs all node level procedures associated with Gn/Gp interface.
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.
srb
Standard Routing
Database
Database
Eight srbs are created by the Session Controller when Content Filtering in the
Enhanced Charging Service is enabled. A minimum of two packet processing cards
are required to initiate these eight tasks.
Enhanced Charging Service is enabled. A minimum of two packet processing cards
are required to initiate these eight tasks.
Receives the static database from the session controller. Each srb task loads two
database volumes (one primary and one secondary). The srb task also stores the
static DB.
database volumes (one primary and one secondary). The srb task also stores the
static DB.
Rates and categorizes the URL based on the DB volumes and CSI (Category Set
Index) stored on it.
Index) stored on it.
Performs peer loading in case its peer fails. If both the srb task and its peer fail, the
session controller performs the loading.
session controller performs the loading.
Platform Processes
Table 51. Platform Process Tasks
Task
Description
Function
afctrl
ASR 5500 Fabric
Controller
Controller
Responsible for the overall management of the system fabric. Manages the pool of
Rendezvous Destinations and coordinates fabric recovery by the afmgr proclets after
a fault. A single afctrl instance runs on the active MIO/UMIO only.
Rendezvous Destinations and coordinates fabric recovery by the afmgr proclets after
a fault. A single afctrl instance runs on the active MIO/UMIO only.
afmgr
ASR 5500 Fabric
Manager
Manager
Responsible for the management of fabric resources on a particular card. There is
one afmgr on every CPU that is responsible for one or more fabric access processors
(FAPs) or fabric elements (FEs). afmgr supports recovery but not migration.
one afmgr on every CPU that is responsible for one or more fabric access processors
(FAPs) or fabric elements (FEs). afmgr supports recovery but not migration.
afio
ASR 5500 Fabric I/O
Driver
Driver
Responsible for the direct configuration of the fabric chipset. afio supports non-
messenger interprocess communication (IPC) with the local afmgr and with other
local afio instances
messenger interprocess communication (IPC) with the local afmgr and with other
local afio instances
connproxy
TCP/SCTP Connection
proxy
proxy
Allows applications on any card to share the same TCP/SCTP connection to the
same remote endpoint instead of opening a new connection for each application on
the card.
same remote endpoint instead of opening a new connection for each application on
the card.