broadcast-suppression
Use broadcast-suppression to enable broadcast suppression and set the broadcast suppression threshold.
Use undo broadcast-suppression to disable broadcast suppression.
Syntax
broadcast-suppression { ratio | pps max-pps | kbps max-kbps }
undo broadcast-suppression
Default
Ethernet interfaces do not suppress broadcast traffic.
Views
Ethernet interface view
Predefined user roles
network-admin
Parameters
ratio: Sets the broadcast suppression threshold as a percentage of the interface bandwidth. The value range for this argument is 0 to 100. A smaller value means that 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 value range for the max-pps argument (in pps) is 0 to 1.4881 × the interface bandwidth.
kbps max-kbps: Specifies the maximum number of kilobits of broadcast traffic that the Ethernet interface can forward per second. The value range for this argument (in kbps) is 0 to the interface bandwidth.
Usage guidelines
The broadcast storm suppression features limits the size of broadcast traffic to a threshold 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 the storm-constrain command and the broadcast-suppression command can suppress broadcast storms on a port. The broadcast-suppression command uses the chip to physically suppress broadcast traffic. It has less influence on the device performance than the storm-constrain command, which uses software to suppress broadcast traffic.
For the traffic suppression result to be determined, do not configure both the storm constrain broadcast command and the broadcast-suppression command on an interface.
When you configure the suppression threshold in kbps, the actual suppression threshold might be different from the configured one as follows:
If the configured value is smaller than 64, the value of 64 takes effect.
If the configured value is greater than 64 but not an integer multiple of 64, the integer multiple of 64 that is greater than and closest to the configured value takes effect.
For the suppression threshold that takes effect, see the prompt on the device.
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 The actual value is 10048 on port Ten-GigabitEthernet1/0/1 currently.
The output shows that the value that takes effect is 10048 kbps (157 times of 64), because the chip only supports step 64.
Related commands
multicast-suppression
unicast-suppression