Configuring Storm Suppression - 3Com 4210G Series Configuration Manual

This function is available for auto-negotiation-capable Gigabit Layer-2 Ethernet electrical ports
only..
If you repeatedly use the speed and the speed auto commands to configure the transmission
rate on a port, only the latest configuration takes effect.

Configuring Storm Suppression

You can use the following commands to suppress the broadcast, multicast, and unknown unicast traffic.
In interface configuration mode, the suppression ratio indicates the maximum broadcast, multicast or
unknown unicast traffic that is allowed to pass through an interface. When the broadcast, multicast, or
unknown unicast traffic over the interface exceeds the threshold, the system will discard the extra
packets so that the broadcast, multicast or unknown unicast traffic ratio can drop below the limit to
ensure that the network functions properly.
The storm suppression ratio settings configured for an Ethernet interface may get invalid if you enable
the storm constrain for the interface. For information about the storm constrain function, see
Configuring the Storm Constrain Function on an Ethernet
Follow these steps to set storm suppression ratios for one or multiple Ethernet interfaces:
To do...
Enter system view
Enter
Ethernet
interface
view or port
group view
Set the broadcast storm
suppression ratio
Set the multicast storm
suppression ratio
Use the command...
system-view
Enter
Ethernet
interface interface-type
interface
interface-number
view
Enter port
port-group manual
group view
port-group-name
broadcast-suppression
{ ratio | pps max-pps }
multicast-suppression
{ ratio | pps max-pps }
Interface.
—
Use either command.
If configured in Ethernet interface
view, this feature takes effect on the
current port only; if configured in port
group view, this feature takes effect on
all ports in the port group.
Optional
By default, all broadcast traffic is
allowed to pass through an interface,
that is, broadcast traffic is not
suppressed.
Optional
By default, all multicast traffic is
allowed to pass through an interface,
that is, multicast traffic is not
suppressed.
1-6
Remarks