H3C Technologies H3C S7500E Series Switches User Manual
Page 25
1-11
To do…
Use the command…
Remarks
Set the broadcast storm
suppression ratio
broadcast-suppression
{ ratio | pps
max-pps
| kbps max-bps }
Optional
By default, broadcast traffic is
not suppressed.
Set the multicast storm
suppression ratio
multicast-suppression
{ ratio | pps
max-pps
| kbps max-bps }
Optional
By default, multicast traffic is not
suppressed.
Set the unknown unicast storm
suppression ratio
unicast-suppression
{ ratio | pps
max-pps
| kbps max-bps }
Optional
By default, unknown unicast
traffic is not suppressed.
As for an Ethernet port belongs to a port group, if you set a storm suppression ratio for the port in both
Ethernet port view and port group view, the one configured the last takes effect.
Configuring the Storm Constrain Function on an Ethernet Port
The storm constrain function suppresses packet storms in an Ethernet. With this function enabled on a
port, the system detects the unicast traffic, multicast traffic, or broadcast traffic passing through the
port periodically and takes corresponding actions (that is, blocking or shutting down the port and
sending trap messages and logs) when the traffic detected exceeds the threshold.
Alternatively, you can configure the storm suppression function to control a specific type of traffic. As
the function and the storm constrain function are mutually exclusive, do not enable them at the same
time on an Ethernet port. For example, with unicast storm suppression ratio set on an Ethernet port, do
not enable the storm constrain function for unicast traffic on the port. Refer to
for information about the storm suppression function.
With the storm constrain function enabled on an Ethernet port, you can specify the system to act as
follows when the traffic detected exceeds the threshold.
Blocking the port. In this case, the port is blocked and thus stops forwarding the traffic of this type
till the traffic detected is lower than the threshold. Note that a port blocked by the storm constrain
function can still forward other types of traffic and monitor the blocked traffic.
Shutting down the port. In this case, the port is shut down and stops forwarding all types of traffic.
Ports shut down by the storm constrain function can only be brought up by using the undo
shutdown
command or disabling the storm constrain function.