12
Both storm suppression and storm control can suppress storms on an interface. Storm suppression
uses the chip to suppress traffic. Storm suppression has less impact on the device performance than
storm control, which uses software to suppress traffic.
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.
Configuration restrictions and guidelines
For the traffic suppression result to be determined, do not configure storm control together with storm
suppression for the same type of traffic. For more information about storm suppression, see
"
Configuration procedure
To configure storm control on an Ethernet interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
(Optional.) Set the statistics
polling interval of the storm
control module.
storm-constrain interval interval
The default setting is 10 seconds.
For network stability, use the
default or set a longer statistics
polling interval.
3.
Enter Ethernet interface
view.
interface interface-type
interface-number
N/A
4.
(Optional.) Enable storm
control, and set the lower
and upper thresholds for
broadcast, multicast, or
unknown unicast traffic.
storm-constrain
{
broadcast
|
multicast
|
unicast
}
{
pps
|
kbps
|
ratio
}
max-pps-values
min-pps-values
By default, storm control is
disabled.
5.
Set the control action to take
when monitored traffic
exceeds the upper
threshold.
storm-constrain control
{
block
|
shutdown
}
By default, storm control is
disabled.
6.
(Optional.) Enable the
Ethernet interface to output
log messages when it
detects storm control
threshold events.
storm-constrain enable log
By default, the Ethernet interface
outputs log messages when
monitored traffic exceeds the
upper threshold or drops below
the lower threshold.
7.
(Optional.) Enable the
Ethernet interface to send
storm control threshold
event traps.
storm-constrain enable trap
By default, the Ethernet interface
sends traps when monitored
traffic exceeds the upper
threshold or drops below the
lower threshold from the upper
threshold.
Forcibly bringing up a fiber port
IMPORTANT:
Copper ports do not support this feature.
As shown in
, a fiber port uses separate fibers for transmitting and receiving packets. The
physical state of the fiber port is up only when both transmit and receive fibers are physically
connected. If one of the fibers is disconnected, the fiber port does not work.
To enable a fiber port to forward traffic over a single link, you can use the
port up-mode
command.
This command forcibly brings up a fiber port, even when no fiber links or transceiver modules are
