C
HAPTER
9
| Congestion Control
Automatic Traffic Control
– 267 –
Figure 127: Configuring ATC Timers
CONFIGURING ATC
T
HRESHOLDS AND
RESPONSES
Use the Traffic > Auto Traffic Control (Configure Interface) page to set the
storm control mode (broadcast or multicast), the traffic thresholds, the
control response, to automatically release a response of rate limiting, or to
send related SNMP trap messages.
CLI REFERENCES
â—† "Automatic Traffic Control Commands" on page 1031
PARAMETERS
These parameters are displayed in the web interface:
◆ Storm Control – Specifies automatic storm control for broadcast
traffic or multicast traffic.
◆ Port – Port identifier.
◆ State – Enables automatic traffic control for broadcast or multicast
storms. (Default: Disabled)
Automatic storm control is a software level control function. Traffic
storms can also be controlled at the hardware level using the Storm
Control menu. However, only one of these control types can be applied
to a port. Enabling automatic storm control on a port will disable
hardware-level storm control on that port.
◆ Action – When the Alarm Fire Threshold (upper threshold) is exceeded
and the apply timer expires, one of the following control responses will
be triggered.
â–
Rate Control
– The rate of ingress traffic is limited to the level set
by the Alarm Clear Threshold. Rate limiting is discontinued only
after the traffic rate has fallen beneath the Alarm Clear Threshold
(lower threshold), and the release timer has expired. (This is the
default response.)
â–
Shutdown
– The port is administratively disabled. A port disabled
by automatic traffic control can only be manually re-enabled using
the Manual Control Release attribute.
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