R21xx-HP FlexFabric 11900 Layer 2 LAN Switching Command Reference

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Layer 2 Ethernet interface view
Predefined user roles
network-admin
Parameters
ratio: Sets the broadcast suppression threshold as a percentage of the maximum interface rate. This
argument is in the range of 0 to 100. The smaller the percentage, the less broadcast traffic is allowed to
pass through.
pps max-pps: Specifies the maximum number of broadcast packets that the interface can forward per
second. The max-pps argument (in pps) is in the range of 1 to 1.4881 × the maximum interface rate. For
example, this argument is in the range of 1 to 1488100 on a GE interface and 1 to 59524000 on a
40-GE interface.
kbps max-kbps: Specifies the maximum number of kilobits of broadcast traffic that the Ethernet interface
can forward per second. This argument (in kbps) is in the range of 1 to the maximum interface rate.
Usage guidelines
You can use the broadcast storm suppression function to limit the size of broadcast traffic on an interface.
When the broadcast traffic on the interface exceeds this threshold, the system drops packets until the
traffic drops below this threshold.
Both storm-constrain and broadcast-suppression can suppress broadcast storm on a port. The
storm-constrain command uses software to suppress broadcast traffic, and it affects the device
performance to a certain extent. The broadcast-suppression command uses the chip to physically
suppress broadcast traffic, and it has less influence on the device performance than the storm-constrain
command. Do not configure the storm constrain command and the broadcast-suppression command at
the same time. Otherwise, the traffic suppression result is not determined.
When you configure the broadcast suppression threshold in kbps, the switch automatically uses a
multiple of 64 as the threshold. If you configure a value less than 64, the switch sets the threshold to 64
kbps. If you configure a value greater than 64, the switch sets the threshold to a multiple of 64 which is
greater than the configured value and is nearest to the value than other multiples.
Examples
# Set the broadcast suppression threshold to 10000 kbps on Ten-GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/1
[Sysname-Ten-GigabitEthernet1/0/1] broadcast-suppression kbps 10000
# Set the broadcast suppression threshold to 10000 kbps on Ten-GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/1
[Sysname-Ten-GigabitEthernet1/0/1] broadcast-suppression kbps 10000
Info: The actual value is 10048 on this port currently.
Related commands
• multicast-suppression
• unicast-suppression