Configuring the APN AMBR Traffic Policing Feature

This section describes how to configure the APN-AMBR Traffic Policing feature.

configure 
           context  context_name 
             apn  apn_name 
         apn-ambr rate-limit direction { downlink | uplink } [ burst-size { auto-readjust duration { milliseconds msecs | seconds } | violate-action { drop | lower-ip-precedence | transmit } 
                   end
 

NOTES:

  • rate-limit direction { downlink | uplink } : Specifies that the rate limit is to be applied to either the downlink (network to subscriber) traffic or the uplink (subscriber to network) traffic.

  • burst-size { auto-readjust duration milliseconds msecs | seconds } : This parameter is used by policing algorithms to permit short bursts of traffic not to exceed the allowed data rates. It’s the maximum size of the token bucket.

    • auto-readjust duration seconds : The duration (in seconds) used in this burst size calculation: burst size = peak data rate/8 * auto-readjust duration.

      • Seconds must be an integer value from 1-30. Default is 1 second.

    • milliseconds : msecs must be an integer value from 100-900, in increments of 100 milliseconds. For example, 100, 200, or 300, and so on.

  • violate-action { drop | lower-ip-precedence | transmit } : The action that the P-GW takes when the data rate of the bearer context exceeds the AMBR.

    • drop : Drops violating packets.

    • lower-ip-precedence : Sets the DSCP value to zero ("best effort") for violating packets.

    • transmit : Transmits violating packets. This is the default behavior of the feature.

  • Prior to this feature, the default behavior was to drop the violating packets.