D-Link DES-3528 User Manual page 134

xStack DES-3528 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual
Parameter Description
From Port/To
A consecutive group of ports may be configured starting with the selected port.
Port
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 Port Configuration window in the Administration folder and selecting the disabled port and
returning it to an Enabled status. 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 is disable forever state, port will not enter to shut down forever.
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. The Interval may be set between 5 and 30
seconds with the default setting of 5 seconds.
Threshold Specifies the maximum number of packets per second that will trigger the Traffic Control function to
commence. The configurable threshold range is from 0 to 255000 with a default setting of 131072.
Storm Control Select the type of Storm Type to detect, either Broadcast Multicast or Unicast. Once selected, use
Type the pull-down menu to enable or disable this storm detection.
Storm 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.
Click Apply to implement the settings made.
Traffic Control Settings
•
None – Will not send 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.
NOTE: Traffic Control cannot be implemented on ports that are set for
Link Aggregation (Port Trunking).
Traffic Trap Setting
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