Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 837)

Brocade 6910 Ethernet Access Switch Configuration Guide 787
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Automatic Traffic Control
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• 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.
• 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.)
• 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.
• Auto Release Control – Automatically stops a traffic control response of rate limiting when
traffic falls below the alarm clear threshold and the release timer expires as illustrated in
Figure 133 on page 784 . When traffic control stops, the event is logged by the system and a
Traffic Release Trap can be sent. (Default: Disabled)
If automatic control release is not enabled and a control response of rate limiting has been
triggered, you can manually stop the rate limiting response using the Manual Control Release
attribute. If the control response has shut down a port, it can also be re-enabled using Manual
Control Release.
• Alarm Fire Threshold – The upper threshold for ingress traffic beyond which a storm control
response is triggered after the Apply Timer expires. (Range: 1-255 kilo-packets per second;
Default: 128 Kpps)
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)