18
Step Command
Remarks
2.
(Optional.) Set the statistics
polling interval of the storm
control module.
storm-constrain interval
seconds
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.
Setting the MDIX mode of an Ethernet interface
IMPORTANT:
Fiber ports do not support the MDIX mode setting.
A physical Ethernet interface has eight pins, each of which plays a dedicated role. For example, pins 1
and 2 transmit signals, and pins 3 and 6 receive signals. You can use both crossover and
straight-through Ethernet cables to connect copper Ethernet interfaces. To accommodate these types of
cables, a copper Ethernet interface can operate in one of the following Medium Dependent
Interface-Crossover (MDIX) modes:
•
MDIX mode
—Pins 1 and 2 are receive pins and pins 3 and 6 are transmit pins.
•
MDI mode
—Pins 1 and 2 are transmit pins and pins 3 and 6 are receive pins.
•
AutoMDIX mode
—The interface negotiates pin roles with its peer.
To enable a copper Ethernet interface to communicate with its peer, set the MDIX mode of the interface
by following these guidelines:
•
Typically, set the MDIX mode of the interface to AutoMDIX. Set the MDIX mode of the interface to
MDI or MDIX only when the device cannot determine the cable type.
•
When a straight-through cable is used, configure the interface to operate in an MDIX mode
different than its peer.
•
When a crossover cable is used, perform one of the following operations:
