D-Link DES-1228/ME User Manual page 158

The user may set the following parameters:
Parameter Description
Traffic Trap Enable sending of Storm Trap messages when the type of action taken by the Traffic Control
function in handling a Traffic Storm is one of the following:
This function cannot be implemented in the Hardware mode. (When Drop is chosen in the
Action field.
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 Unknown Unicast Storm Control.
Threshold Specifies the maximum rate per second (Kbps) that will trigger the Traffic Control function to
commence.
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.
Shut Down – 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 rest
mode and if no action is taken will enter auto-recovery mode after a five minute period. 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.
Count Down The Count Down 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. 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, 5-30
minutes. 0 denotes that the port will never shutdown.
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. The Interval may be set between 5
and 30 seconds with the default setting of 5 seconds.
Click Apply to implement the settings made.
NOTE: Traffic Control cannot be implemented on ports that are set for Link Aggregation (Port
Trunking).
DES-1228/ME Layer 2 Fast Ethernet Managed Switch
Traffic Trap Configuration
•
None – Will send no Storm trap warning messages regardless of action taken by the
Traffic Control mechanism.
•
Storm Occurred – Will send Storm Trap warning messages upon the occurrence of
a 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
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