Web Management Guide-R01

Table Of Contents
Chapter 8
| Congestion Control
Automatic Traffic Control
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Once the traffic rate exceeds the upper threshold and the Apply Timer expires,
a trap message will be sent if configured by the Trap Storm Fire attribute.
Alarm Clear Threshold – The lower threshold for ingress traffic beneath which
a control response for rate limiting will be released after the Release Timer
expires, if so configured by the Auto Release Control attribute. (Range: 1-255
kilo-packets per second; Default: 128 kpps)
If rate limiting has been configured as a control response and Auto Control
Release is enabled, rate limiting will be discontinued after the traffic rate has
fallen beneath the lower threshold, and the Release Timer has expired. Note
that if a port has been shut down by a control response, it will not be re-
enabled by automatic traffic control. It can only be manually re-enabled using
Manual Control Release.
Once the traffic rate falls beneath the lower threshold and the Release Timer
expires, a trap message will be sent if configured by the Trap Storm Clear
attribute.
Trap Storm Fire – Sends a trap when traffic exceeds the upper threshold for
automatic storm control. (Default: Disabled)
Trap Storm Clear – Sends a trap when traffic falls beneath the lower threshold
after a storm control response has been triggered. (Default: Disabled)
Trap Traffic Apply – Sends a trap when traffic exceeds the upper threshold for
automatic storm control and the apply timer expires. (Default: Disabled)
Trap Traffic Release – Sends a trap when traffic falls beneath the lower
threshold after a storm control response has been triggered and the release
timer expires. (Default: Disabled)
Manual Control Release – Manually releases a control response of rate-
limiting or port shutdown any time after the specified action has been
triggered.
Web Interface
To configure the response timers for automatic storm control:
1. Click Traffic, Auto Traffic Control.
2. Select Configure Interface from the Step field.
3. Enable or disable ATC as required, set the control response, specify whether or
not to automatically release the control response of rate limiting, set the upper
and lower thresholds, and specify which trap messages to send.
4. Click Apply.