R211x-HP Flexfabric 11900 Layer 2 - LAN Switching Command Reference
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Usage guidelines
You can use the unicast storm suppression function to limit the size of unicast traffic on an interface. When
the unicast traffic on the interface exceeds this threshold, the system discards packets until the unicast
traffic drops below this threshold.
Both the storm-constrain and unicast-suppression can suppress unicast storm on a port. The
storm-constrain command uses software to suppress unicast traffic, and it affects the device performance
to a certain extent. The unicast-suppression command use the chip to physically suppress unicast traffic,
and it has less influence on the device performance than the storm-constrain command. Do not configure
the storm constrain command and the unicast-suppression command at the same time. Otherwise, the
unicast traffic suppression result is not determined.
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.
To determine the suppression threshold that takes effect, see the prompts on the device.
Examples
# Set the unicast storm 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] unicast-suppression kbps 10000
The actual value is 10048 on port Ten-GigabitEthernet1/0/1 currently.
Related commands
• broadcast-suppression
• multicast-suppression
virtual-cable-test
IMPORTANT:
This command is not applicable to fiber ports.
Use virtual-cable-test to test the cable connection of an Ethernet interface and display the test results.
Syntax
virtual-cable-test
Views
Layer 2 Ethernet interface view
Predefined user roles
network-admin
Usage guidelines
If the link of an Ethernet interface is up, testing its cable connection will cause the link to go down and
then up.