D-Link xStack DGS-3400 Series Reference Manual page 308

x Stack
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This function cannot be implemented in the Hardware mode. (When Drop is chosen in the Action
field).
Traffic Control Enter the time allowed for auto recovery from shutdown for a port. The default value is 0, which
Auto Recover means no auto recovery is possible and the port remains in shutdown forever mode. This requires
Time (0-65535)
manual entry of the CLI command "config ports [ <portlist> | all ] state enable" to return the port to a
forwarding state.
Unit Choose the Switch ID number of the Switch in the switch stack to be modified.
From / To Select the ports of this Switch to configure for Storm Control.
Broadcast Enables or disable Broadcast Storm Control.
Multicast
Enables or disables Multicast Storm Control.
Unicast
Enables or disables Unicast Storm Control.
Action Select the method of traffic Control from the pull-down menu. The choices are:
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 Storm Control Recover
setting at the top of this window. Choosing this option obligates the user to configure the Interval
setting as well, which will provide packet count samplings from the Switch's chip to determine if a
Packet Storm is occurring.
Threshold (0-
Specifies the maximum number of packets per second that will trigger the Traffic Control function to
255000) commence. The configurable threshold range is from 0 to 255000 with a default setting of 131072.
Count Down (0 The Count Down timer is set to determine the amount of time, in minutes, that the Switch will wait
or 3-30)
before shutting down the port that is experiencing a traffic storm. This parameter is only useful for
ports configured as Shutdown in their Action field and therefore will not operate for Hardware based
Traffic Control implementations. The possible time settings for this field are 0, 3 to 30 minutes. 0 is
the default setting for this field and will denote that the port will never shutdown. Tick the Disabled
check box to disable the function.
Time Interval The Interval will set the time between Multicast and Broadcast packet counts sent from the Switch's
(5-600)
chip to the Traffic Control function. These packet counts are the determining factor in deciding when
incoming packets exceed the Threshold value. The Interval may be set between 5 and 600 seconds
with the default setting of 5 seconds.
Click Apply to implement the settings of each field.
®
DGS-3400 Series Layer 2 Gigabit Ethernet M anaged Sw itch
Traffic Storm only.
Storm Cleared – Will send Storm Trap messages when a Traffic Storm has been cleared
by the Switch only.
Both – Will send Storm Trap messages when a Traffic Storm has been both detected and
cleared by the Switch.
Traffic Control Settings
NOTE: Traffic Control cannot be implemented on ports that are set for
Link Aggregation (Port Trunking).
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