H3C S5120-EI Series, Operation Manual

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1-10
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10-Gigabit Ethernet ports and optical ports of SFP ports do not support this feature.
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A link in the up state goes down and then up automatically if you perform the operation described in
this section on one of the Ethernet ports forming the link.
Follow these steps to test the current operating state of the cable connected to an Ethernet port:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter Ethernet port view
interface interface-type
interface-number
—
Test the cable connected to the
Ethernet port once
virtual-cable-test
Required
Configuring the Storm Constrain Function on an Ethernet Port
The storm constrain function suppresses packet storms in an Ethernet. With this function enabled on a
port, the system detects the multicast traffic, or broadcast traffic passing through the port periodically
and takes corresponding actions (that is, blocking or shutting down the port and sending trap messages
and logs) when the traffic detected exceeds the threshold.
Alternatively, you can configure the storm suppression function to control a specific type of traffic. As
the function and the storm constrain function are mutually exclusive, do not enable them at the same
time on an Ethernet port. For example, with broadcast storm suppression ratio set on an Ethernet port,
do not enable the storm constrain function for broadcast traffic on the port. Refer to
Configuring Storm
Suppression for information about the storm suppression function.
With the storm constrain function enabled on an Ethernet port, you can specify the system to act as
follows when the traffic detected exceeds the threshold.
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Blocking the port. In this case, the port is blocked and thus stops forwarding the traffic of this type
till the traffic detected is lower than the threshold. Note that a port blocked by the storm constrain
function can still forward other types of traffic and monitor the blocked traffic.
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Shutting down the port. In this case, the port is shut down and stops forwarding all types of traffic.
Ports shut down by the storm constrain function can only be brought up by using the
undo
shutdown
command or disabling the storm constrain function.
Follow these steps to configure the storm constrain function on an Ethernet port:
To do… Use the command… Remarks
Enter system view
system-view
—