4000 Router Series Interface Command Reference

Default

Ethernet interfaces do not suppress multicast traffic.

Views

Layer 2 Ethernet interface view

Predefined user roles

network-admin

Parameters

ratio: Sets the multicast suppression threshold as a percentage of the maximum interface rate. The value

range for this argument (in percentage) is 0 to 100. The smaller the percentage, the less multicast traffic

is allowed to pass through.

pps max-pps: Specifies the maximum number of multicast packets that the interface can forward per

second. The value range for the max-pps argument (in pps) is 1 to 1.4881 × the maximum interface rate.

For example, the value range for this argument is 1 to 1488100 on a GE interface.

kbps max-kbps: Specifies the maximum number of kilobits of multicast traffic that the Ethernet interface

can forward per second. The value range for this argument (in kbps) is 1 to the maximum interface rate.

Usage guidelines

You can use the multicast storm suppression function to limit the size of multicast traffic on an interface.

When the multicast traffic on the interface exceeds this threshold, the system drops packets until the traffic

drops below this threshold.

When you configure the suppression threshold in pps or kbps, the device might convert the configured

value into a multiple of a certain step supported by the chip. As a result, the actual suppression threshold

might be different from the configured one. To determine the suppression threshold that takes effect, see

the prompts on the device.

Examples

# Set the multicast storm suppression threshold to 10000 kbps on Ethernet 1/1.

<Sysname> system-view

[Sysname] interface ethernet 1/1

[Sysname-Ethernet1/1] multicast-suppression kbps 10000

Related commands

• broadcast-suppression

• unicast-suppression

unicast-suppression

Use unicast-suppression to enable unicast storm suppression and set the unicast storm suppression

threshold.

Use undo unicast-suppression to restore the default.

Syntax

unicast-suppression { ratio | pps max-pps | kbps max-kbps }

undo unicast-suppression