D-Link DGS-3700 Series User Manual page 146

DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet Switch User Manual
The following parameters can be configured:
Parameter
From Port / To Port
Action
Count Down
(0 or 5-30)
Time Interval (5-30)
Threshold
(0-255000)
Storm Control Type
Traffice Trap
Settings
Click Apply to implement the settings made.
Description
Traffic Control Settings
A consecutive group of ports may be configured starting with the selected port.
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.
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. 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, 5-30 minutes. 0 is disable
forever state, port will not enter shutdown forever mode.
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.
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.
Select the type of Storm Type to detect, either Broadcast Multicast or Unicast. Once selected,
use the pull-down menu to enable or disable this storm detection.
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 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.
This function cannot be implemented in the Hardware mode. (When Drop is chosen in the
Action field.
NOTE: Traffic Control cannot be implemented on ports that are set for
Link Aggregation (Port Trunking).
Traffic Trap Setting
135