Cisco Cisco Packet Data Gateway (PDG)
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SGSN Changes in Release 17
SGSN Enhancements for 17.0 ▀
Release Change Reference, StarOS Release 17 ▄
515
low-priority-ind-ue
: Instructs the SGSN to only take defined action if messages include low access priority
indicator (LAPI).
apn-based
: Instructs the SGSN to reject sm-messages based on the APN if congestion control is configured for
that APN under an applicable Operator Policy.
If both the LAPI and APN-based options are included in the action-profile, then the call event will only be
rejected if both conditions are matched.
Use the
show sgsn-mode
command to display the SGSN’s congestion-control configuration defined with the
command listed above.
apn
A new keyword,
congestion-control
, enables the operator to associate congestion control functionality with a
specific APN so that congestion responses can be applied per APN.
configure
operator-policy name op_policy_name
[ no ] apn network-identifier apn_name congestion-control
end
Notes:
no
: When this filter is added to the command, the SGSN deletes the APN network-identifier configuration
associated with congestion control from the Operator Policy.
op_policy_name
: Enter a string of 1 to 64 alphanumeric characters to create or identify an operator policy.
apn_name
: Enter a string of 1 to 63 characters, including dots (.) and dashes (-), to identify a specific APN
network ID.
congestion-control
: Including this keyword associates congestion control functionality with the identified
APN.
During an Attach Request, new Inter SGSN RAU, or when receiving sm-messages, all subscribed APNs for
mobility management (MM) or selected APNs for session management (SM) will be checked to determine if
any of them is configured for congestion control, in which case the new call or sm-messages would be rejected.
any of them is configured for congestion control, in which case the new call or sm-messages would be rejected.
sgsn trigger-congestion
For operations and maintenance purposes (e.g., testing), this command triggers a congestion state at the global level.
sgsn trigger-congestion level { critical | major | minor }
Notes:
critical | major | minor
: Selecting one of the three congestion severity levels indicates the associated
congestion-action-profile to be chosen and applied. Reminder: the profile is associated with the severity level
with the
with the
congestion-control policy
command.
sgsn clear congestion
For operations and maintenance purposes (e.g., testing), this command clears congestion triggered using the
sgsn
trigger congestion
command.