Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 364)

314 Brocade 6910 Ethernet Access Switch Configuration Guide
53-1002581-01
Automatic Traffic Control Commands
16
Usage Guidelines
ATC includes storm control for broadcast or multicast traffic. The control response for either of
these traffic types is the same, as shown in the following diagrams.
FIGURE 1 Storm Control by Limiting the Traffic Rate
The key elements of this diagram are described below:
• Alarm Fire Threshold – The highest acceptable traffic rate. When ingress traffic exceeds the
threshold, ATC sends a Storm Alarm Fire Trap and logs it.
• When traffic exceeds the alarm fire threshold and the apply timer expires, a traffic control
response is applied, and a Traffic Control Apply Trap is sent and logged.
• Alarm Clear Threshold – The lower threshold beneath which a control response can be
automatically terminated after the release timer expires. When ingress traffic falls below this
threshold, ATC sends a Storm Alarm Clear Trap and logs it.
• When traffic falls below the alarm clear threshold after the release timer expires, traffic control
(for rate limiting) will be stopped and a Traffic Control Release Trap sent and logged. Note that
if the control action has shut down a port, it can only be manually re-enabled using the
auto-traffic-control control-release command).
• The traffic control response of rate limiting can be released automatically or manually. The
control response of shutting down a port can only be released manually.
ATC Display Commands
show auto-traffic-control Shows global configuration settings for automatic storm control PE
show auto-traffic-control
interface Shows interface configuration settings and storm control status for
the specified port PE
* Enabling automatic storm control on a port will disable hardware-level storm control on the same port if configured by the
switchport packet-rate command.
TABLE 74 ATC Commands (Continued)
Command Function Mode
Storm Alarm
Fire TRAP
Alarm Fire
Threshold
（1～255kpps）
AlarmClear
Threshold
（1～255kpps）
Traffic
[kpps]
Time
Traffic without storm control
Traffic with storm control
Apply Timer
expired
(0～300sec)
Auto Storm Control
Release Timer
expired
(0～300sec)
Storm Alarm
Fire TRAP
StromAlarm
ClearTRAP
TrafficControl
Apply Trap
StromAlarm
ClearTRAP
TrafficControl
Release Trap
Storm Alarm
Fire TRAP
Alarm Fire
Threshold
（1～255kpps）
AlarmClear
Threshold
（1～255kpps）
Traffic
[kpps]
Time
Traffic without storm control
Traffic with storm control
Apply Timer
expired
(0～300sec)
Auto Storm Control
Release Timer
expired
(0～300sec)
Storm Alarm
Fire TRAP
StromAlarm
ClearTRAP
TrafficControl
Apply Trap
StromAlarm
ClearTRAP
TrafficControl
Release Trap