D-Link DAS-3636, Справочное руководство CLI

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DAS-3600 Series Ethernet over VDSL Switch CLI Reference Manual
config traffic control
Purpose Used to configure broadcast/multicast/unicast packet storm control. The software mechanism
is provided to monitor the traffic rate in addition to the hardware storm control mechanism
previously provided.
Syntax config traffic control [<portlist> | all] {broadcast [enable | disable] | multicast [enable |
disable] | unicast [enable | disable] | action [drop | shutdown] | threshold <value 0-
255000> | time_interval <value 5-30> | countdown [value 0 | <value 5-30>]}
Description This command is used to configure broadcast/multicast/unicast storm control. By adding the
new software traffic control mechanism, the user can now use both a hardware and software
mechanism, the latter of which will now provide shutdown, recovery and trap notification
functions for the Switch.
Parameters
<portlist>
−
Used to specify a group list of ports to be configured for traffic control, as defined
below:
all
−
Specifies all portlists are to be configured for traffic control on the Switch.
broadcast [enable | disable]
−
Enables or disables broadcast storm control.
multicast [enable | disable]
−
Enables or disables multicast storm control.
unicast [enable | disable]
−
Enables or disables unicast traffic control.
action – Used to configure the action taken when a storm control has been detected on the
Switch. The user has two options:
•
drop
−
Utilizes the hardware Traffic Control mechanism, which means the Switch’s
hardware will determine the Packet Storm based on the Threshold value stated and
drop packets until the issue is resolved.
•
shutdown
−
Utilizes the Switch’s software Traffic Control mechanism to determine
the Packet Storm occurring. Once detected, the port will deny all incoming traffic to
the port except STP BPDU packets, which are essential in keeping the Spanning
Tree operational on the Switch. If the countdown timer has expired and yet the
Packet Storm continues, the port will be placed in Shutdown Forever mode and is
no longer operational until the user manually resets the port using the
config ports
enable command. Choosing this option obligates the user to configure the
time_interval field as well, which will provide packet count samplings from the
Switch’s chip to determine if a Packet Storm is occurring.
threshold <value 0-255000>
−
The upper threshold at which the specified traffic control is
switched on. The <value> is the number of broadcast/multicast/unicast packets, in packets
per second (pps), received by the Switch that will trigger the storm traffic control measures.
The default setting is
131072 .
time_interval
−
The Interval will set the time between Multicast and Broadcast packet counts
sent from the Switch’s chip to the Traffic Control function. These packet counts are the
determining factor in deciding when incoming packets exceed the Threshold value.
value 5-30
−
The Interval may be set between 5 and 30 seconds with the default setting of 5
seconds.
countdown
−
The countdown timer is set to determine the amount of time, in minutes, that the
Switch will wait before shutting down the port that is experiencing a traffic storm. The switch
will shutdown the port only if the traffic level exceeds the configured threshold all the time
during this countdown period. This parameter is only useful for ports configured as
shutdown
in the action field of this command and therefore will not operate for Hardware based Traffic
Control implementations.
•
value 0
−
0 is the default setting for this field and 0 will denote that the port will
never shutdown forever.
•
value 5-30 – Select a time from 5 to 30 minutes that the Switch will wait before
shutting down. Once this time expires and the port is still experiencing packet
storms, the port will be placed in shutdown forever mode and can only be manually
recovered using the config ports command mentioned previously in this manual.
Restrictions Only Administrator and Operator-level users can issue this command.
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