Cisco Cisco ASR 5700
APN Configuration Mode Commands
qos rate-limit ▀
Command Line Interface Reference, StarOS Release 17 ▄
1435
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.
this action.
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.)
To calculate the burst size dynamically, an optional keyword
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
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.
If the
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.
If the
If the
auto-readjust
keyword is provided without specifying the duration, a default duration of 1 second
will be used for burst size calculation.
Example
The following command lowers the IP precedence when the committed-data-rate and the peak-data-rate are
violated in uplink direction:
violated in uplink direction:
qos rate-limit direction uplink violate-action lower-ip-precedence