3Com 4510G Configuration Manual page 49

Blocking the interface. In this case, the interface is blocked and thus stops forwarding the traffic of
this type till the traffic detected is lower than the threshold. Note that an interface blocked by the
storm constrain function can still forward other types of traffic and monitor the blocked traffic.
Shutting down the interface. In this case, the interface is shut down and stops forwarding all types
of traffic. Interfaces shut down by the storm constrain function can only be brought up by using the
undo shutdown command or disabling the storm constrain function.
Follow these steps to configure the storm constrain function on an Ethernet interface:
To do...
Enter system view
Set the interval for generating
traffic statistics
Enter Ethernet interface view
Enable the storm constrain
function and set the lower
threshold and the upper
threshold
Set the action to be taken when
the traffic exceeds the upper
threshold
Specify to send trap messages
when the traffic detected
exceeds the upper threshold or
drops down below the lower
threshold from a point higher
than the upper threshold
Specify to send log when the
traffic detected exceeds the
upper threshold or drops down
below the lower threshold from
a point higher than the upper
threshold
Use the command...
system-view
storm-constrain interval
seconds
interface interface-type
interface-number
storm-constrain { broadcast |
multicast } { pps | kbps |
ratio } max-pps-values
min-pps-values
storm-constrain control
{ block | shutdown }
storm-constrain enable trap
storm-constrain enable log
1-11
Remarks
—
Optional
10 seconds by default
—
Required
Disabled by default
Optional
Disabled by default
Optional
By default, the system sends
trap messages when the traffic
detected exceeds the upper
threshold or drops down below
the lower threshold from a point
higher than the upper
threshold.
Optional
By default, the system sends
log when the traffic detected
exceeds the upper threshold or
drops down below the lower
threshold from a point higher
than the upper threshold.