H3C S7500E-XS Series, Interface Configuration Manual

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14
Configuration procedure
To set storm suppression thresholds on an Ethernet interface:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter Ethernet interface
view.
interface interface-type
interface-number
N/A
3. Enable broadcast
suppression and set the
broadcast suppression
threshold.
broadcast-suppression { ratio |
pps max-pps | kbps max-kbps }
By default, broadcast suppression
is disabled.
4. Enable multicast
suppression and set the
multicast suppression
threshold.
multicast-suppression { ratio |
pps max-pps | kbps max-kbps }
By default, multicast suppression
is disabled.
5. Enable unknown unicast
suppression and set the
unknown unicast
suppression threshold.
unicast-suppression { ratio |
pps max-pps | kbps max-kbps }
By default, unknown unicast
suppression is disabled.
Configuring storm control on an Ethernet interface
About storm control
Storm control compares broadcast, multicast, and unknown unicast traffic regularly with their
respective traffic thresholds on an Ethernet interface. For each type of traffic, storm control provides
a lower threshold and an upper threshold.
Depending on your configuration, when a particular type of traffic exceeds its upper threshold, the
interface performs either of the following tasks:
•
Blocks this type of traffic and forwards other types of traffic —Even though the interface
does not forward the blocked traffic, it still counts the traffic. When the blocked traffic drops
below the lower threshold, the interface begins to forward the traffic.
•
Goes down automatically —The interface goes down automatically and stops forwarding any
traffic. When the blocked traffic drops below the lower threshold, the interface does not
automatically come up. To bring up the interface, use the
undo shutdown command or disable
the storm control feature.
You can configure an Ethernet interface to output threshold event traps and log messages when
monitored traffic meets one of the following conditions:
•
Exceeds the upper threshold.
•
Drops below the lower threshold.
Any of the storm-constrain , broadcast-suppression , multicast-suppression , and
unicast-suppression commands can suppress storm on an interface. The
broadcast-suppression , multicast-suppression , and unicast-suppression commands suppress
traffic in hardware. They have less impact on the device performance than the storm-constrain
command, which suppressions traffic in software.
Storm control uses a complete polling cycle to collect traffic data, and analyzes the data in the next
cycle. An interface takes one to two polling intervals to take a storm control action.