Cisco Cisco Packet Data Gateway (PDG)
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More than one of the above keywords can be entered within a single command.
Usage Guidelines
This command configures APN quality of service (QoS) through traffic policing. This command enables the
actions on subscriber flows exceeding or violating the allowed peak/committed data rate.
actions on subscriber flows exceeding or violating the allowed peak/committed data rate.
This command is not intended for bearer level policing
Important
If the exceed/violate action is set to "lower-ip-precedence", this command may override the configuration
of the ip qos-dscp command in the GGSN Service Configuration mode for packets from the GGSN to
the SGSN. In addition, the GGSN service ip qos-dscp command configuration can override the APN
setting for packets from the GGSN to the Internet. Therefore, it is recommended that this command not
be used in conjunction with this action.
of the ip qos-dscp command in the GGSN Service Configuration mode for packets from the GGSN to
the SGSN. In addition, the GGSN service ip qos-dscp command configuration can override the APN
setting for packets from the GGSN to the Internet. Therefore, it is recommended that this command not
be used in conjunction with this action.
Important
The command can be entered multiple times to specify different combinations of direction and class. If this
command is not configured at all, the GGSN does not perform traffic policing or QoS negotiation with the
SGSN. (It accepts all of the SGSN-provided values for the PDP context.)
command is not configured at all, the GGSN does not perform traffic policing or QoS negotiation with the
SGSN. (It accepts all of the SGSN-provided values for the PDP context.)
To calculate the burst size dynamically, an optional keyword auto-readjust [ duration dur ] is provided with
the burst-size keyword. By default, the burst size is fixed if defined in bytes with this command. Regardless
of the rate being enforced, burst-size is fixed as set by the burst-size bytes parameter.
the burst-size keyword. By default, the burst size is fixed if defined in bytes with this command. Regardless
of the rate being enforced, burst-size is fixed as set by the burst-size bytes parameter.
The auto-readjust [ duration dur ] keyword enables variable burst size depending on the rate being enforced.
The system calculates burst size using a per token bucket algorithm calculation as T=B/R, where T is the time
interval, B is the burst size and R is the Rate being enforced. It also provides different burst size for Peak and
Committed data rate-limiting.
The system calculates burst size using a per token bucket algorithm calculation as T=B/R, where T is the time
interval, B is the burst size and R is the Rate being enforced. It also provides different burst size for Peak and
Committed data rate-limiting.
If the auto-readjust keyword is not used, a fixed burst size must be defined which will be applicable for peak
data rate and committed data rate regardless of the rate being enforced.
data rate and committed data rate regardless of the rate being enforced.
If the auto-readjust keyword is provided without specifying the duration, a default duration of 1 second will
be used for burst size calculation.
be used for burst size calculation.
Examples
The following command lowers the IP precedence when the committed-data-rate and the peak-data-rate are
violated in uplink direction:
qos rate-limit direction uplink violate-action lower-ip-precedence
violated in uplink direction:
qos rate-limit direction uplink violate-action lower-ip-precedence
Command Line Interface Reference, Modes A - B, StarOS Release 19
1704
APN Configuration Mode Commands
qos rate-limit