3Com Baseline 2928 PWR Plus User Manual page 118

Figure 1-2 Add storm constrain settings for ports
Table 1-1 describes the port storm constrain configuration items.
Table 1-1 Port storm constrain configuration items
Item
Control Mode
Broadcast Threshold
Multicast Threshold
Unicast Threshold
Specify the action to be performed when a type of traffic exceeds the
corresponding upper threshold. Available options include:
None: Perform no action.
Block: Block the traffic of this type on a port when the type of traffic
exceeds the upper threshold.
Shutdown: Shut down the port when a type of traffic exceeds the traffic
threshold. The port stops forwarding traffic as a result.
The storm constrain function, after being enabled, requires a full traffic
statistics generating interval (in seconds) to collect traffic data, and analyzes
the data in the next interval. Thus, it is normal that a period longer than one
traffic statistics generating interval is waited for a control action to happen if
you enable the function while the packet storm is present. Nevertheless, the
action will be taken within two intervals.
Set the broadcast, multicast, and unicast thresholds.
None: Perform no storm constrain for the selected port or ports.
pps: Specify the storm constrain upper threshold and lower threshold in
packets per second (pps).
On a port, you can set the thresholds for broadcast, multicast, and
unicast traffic at the same time. To set storm constrain on a port
successfully, you must specify the thresholds for at least a type of traffic.
When the pps option is selected, the upper threshold and lower threshold
ranges depend on the interface type, as shown in the pps range
description on the page.
1-3
Remarks