R21xx-HP FlexFabric 11900 Layer 2 LAN Switching Command Reference

39
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 unknown unicast 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 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
# Set the unknown unicast 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
Info: The actual value is 10048 on this port currently.
Related commands
• broadcast-suppression
• multicast-suppression
virtual-cable-test
IMPORTANT:
This command is not available on 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.
The test result is for reference only. The cable length detection error is up to 5 m (about 16 ft). If a test item
is not available, a hyphen (-) is displayed.
Examples
# Test the cable connection of Ten-GigabitEthernet 1/0/1.