DXS-1210 Series Smart Managed Switch CLI Reference Guide
320
unicast
Specifies to set the unicast rate limit. When the action is configured as
the shutdown mode, the unicast refers to both known and unknown
unicast packets; that is, if the known and unknown unicast packets hit
the specified threshold, the port will be shutdown. Otherwise, unicast
refers to unknown unicast packets.
level pps PPS-RISE [PPS-
LOW]
Specifies the threshold value in packets count per second. The range
is from 0 to 2147483647. If the low PPS value is not specified, the
default value is 80% of the specified risen PPS.
level kbps KBPS-RISE [KBPS-
LOW]
Specifies the threshold value as a rate of bits per second at which
traffic is received on the port. The range is from 0 to 2147483647. If
the low KBPS is not specified, the default value is 80% of the specified
risen KBPS.
action shutdown
Specifies to shutdown the port when the value specified for rise
threshold is reached.
action drop
Specifies to discards packets that exceed the risen threshold.
action none
Specifies not to filter the storm packets.
Default
By default, the broadcast, multicast, and unicast (DLF) storm controls are disabled.
The default action taken when a storm occurs is to drop storm packets.
Command Mode
Interface Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
Use the storm control function to protect the network from the storm of broadcast packets, multicast
packets, or unknown DA flooding packets. Enter the storm-control command to enable storm control
for a specific traffic type on the interface.
There are two ways to recover an error disabled port.
•
The user can use the errdisable recovery cause command to enable the automatic recovery of
ports that were error disabled by storm control.
•
The user can manually recover the port by entering the shutdown command, followed by the no
shutdown command for the port.
There is only one meter mode (percentage, kbps or pps) that can take effect on an interface. On an
interface, if the later specified meter mode option is different from the previous mode, the previous
configured storms will reset to their default states (disabled in this specification).
Due to hardware limitations, when the meter mode is percentage or kbps:
•
The action cannot be specified to the shutdown mode.
•
There are no traps and logs for the drop and none modes.
This feature is unable to give the precise suppression level of the total bandwidth in percentage (0 to
100) of a specific port interface. The current calculation formula assumes that the packet size is 64
bytes.
Example
This example shows how to enable broadcast storm control on eth1/0/1. It sets the threshold of
eth3/0/1 to 500 packets per second with the shutdown action.
Switch# configure terminal
Switch(config)#interface eth1/0/1
Switch(config-if)# storm-control broadcast level pps 500
Switch(config-if)# storm-control action shutdown
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