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:
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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.
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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.
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auto-readjust duration seconds : The duration (in seconds) used in this burst size calculation: burst size = peak data rate/8 * auto-readjust duration.
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Seconds must be an integer value from 1-30. Default is 1 second.
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milliseconds : msecs must be an integer value from 100-900, in increments of 100 milliseconds. For example, 100, 200, or 300, and so on.
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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.
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drop : Drops violating packets.
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lower-ip-precedence : Sets the DSCP value to zero ("best effort") for violating packets.
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transmit : Transmits violating packets. This is the default behavior of the feature.
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Prior to this feature, the default behavior was to drop the violating packets.