Cisco Cisco ASR 5000
MTC Congestion Control
▀ Configuring MTC Congestion Control
▄ SGSN Administration Guide, StarOS Release 18
Important:
Remember, congestion control must also be enabled with the
congestion-control
command
in the Global Configuration mode. The following is not sufficient to enable congestion control on the SGSN.
The following configuration accomplishes several tasks, all of which must be performed to enable congestion control on
the SGSN.
the SGSN.
1. Enables or disables SGSN-level congestion control.
2. Creates and configures congestion-action-profiles.
2. Creates and configures congestion-action-profiles.
configure
sgsn-global
congestion-control
congestion-action-profile action_profile_name
active-call-policy { rau | service-req } { drop | reject } [ low-priority-ind-
ue ]
ue ]
new-call-policy { drop | reject } [ low-priority-ind-ue ] [ apn-based ]
sm-messages reject [ low-priority-ind-ue ] [ apn-based ]
end
Notes:
congestion-control
: Opens the Congestion-Control configuration mode, in which the congestion control
action-profile can be created.
congestion-action-profile action_profile_name
: Enter a string of 1 to 64 alphanumeric characters to
create or identify a congestion-action-profile and/or to open the Congestion-Action-Profile configuration mode,
which accesses the commands that define the congestion responses for:
which accesses the commands that define the congestion responses for:
active calls
new calls
SM messages
A maximum of 16 action-profiles can be defined.
active-call-policy
: This command instructs the SGSN to drop or reject any active call messages when
congestion occurs during an active call. The active call instructions in the congestion-action-profile can be
refined to only drop or reject active call messages with LAPI.
refined to only drop or reject active call messages with LAPI.
new-call-policy
: This command instructs the SGSN to drop or reject any new calls (Attach Request
messages or new Inter SGSN RAU messages) if new call messages are received during congestion. The new
call instructions in the congestion-action-profile can be refined to only drop or reject new call messages with
low access priority indicator (LAPI).
call instructions in the congestion-action-profile can be refined to only drop or reject new call messages with
low access priority indicator (LAPI).
sm-messages
: This command instructs the SGSN to reject any SM signaling messages (activation or
modification) during congestion. The congestion-action-profile parameter can be refined to only reject SM
signaling messages with LAPI.
signaling messages with LAPI.