D-Link xStack Reference Manual page 130

xStack® DES-3200 Series Layer 2 Ethernet Managed Switch WEB UI Reference Guide
The following parameters can be set or are displayed:
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 Rest mode. The port will be recovered after 5 minutes, or the user manually resets the
port using the Port Configuration window in the Configuration 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
(0 or 5-30)
before shutting down the port that is experiencing a traffic storm. Only the switch continues to
experience a traffic storm during this countdown period and the switch will shutdown the port. 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 to 30 minutes. Zero means that the port will not enter shutdown rest mode.
Time Interval The Interval will set the time between Multicast and Broadcast packet counts sent from the Switch's
(5-30) 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 This value represents the upper threshold at which the specified traffic control is switched on. The
(64- 1000000) threshold value is measured in Kbit/sec when the action is set to drop mode; it is measured in
pps(packets/sec) when the action is set to shutdown mode. That is, the number of
broadcast/multicast/Unknown unicast packets, received by the Switch that will trigger the storm
traffic control measures.
The configurable threshold range is from 64 to 1000000 with a default setting of 64.
Actual rate = |rate entered/ minimum granularity|* minimal granularity, for example:
62.5=|100/62.5|*62.5"
|number| implies the closest smaller integer.
Storm Control Select the type of Storm Type to detect: Broadcast, Multicast, Unknown Unicast, Broadcast +
Type Multicast, Broadcast + Unknown Unicast, Multicast + Unknown Unicast, Broadcast + Multicast +
Unknown Unicast, or None. Once selected, use 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:
None – Will not send any Storm trap warning messages regardless of action taken by the Traffic
Storm Occurred – Will send Storm Trap warning messages upon the occurrence of a Traffic
Storm Cleared – Will send Storm Trap messages when a Traffic Storm has been cleared by the
Both – Will send Storm Trap messages when a Traffic Storm has been both detected and cleared
This function cannot be implemented in the Hardware mode. (When Drop is chosen in the Action
field.
Traffic Control Settings
Control mechanism.
Storm only.
Switch only.
by the Switch.
Traffic Trap Setting
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