D-Link DGS-3620-52P Reference Manual page 277

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
Countdown (0, 3-30 or
disable)
Time Interval (5-600)
Threshold (0-255000)
Traffic Control Type
Traffic Trap Settings
Traffic Log Settings
Traffic Auto Recover
Time (0-65535)
Click the Apply button to accept the changes made for each individual section.
NOTE: Traffic Control cannot be implemented on ports that are set for Link Aggregation (Port
Trunking).
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 Count Down 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 port recovers after 5 minutes automatically or the
user manually resets the port using the Port Settings window (System
Configuration > Port Configuration> Port Settings). Choosing this option
obligates the user to configure the Time 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.
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 and 3 to 30 minutes. Tick the Disabled
check box, and the port will be shut down immediately when detecting storm.
The Time 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 Time Interval may be set between 5 and 600 seconds, with a 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 0-255000
with a default setting of 131072 packets per second.
Specifies the desired Storm Control Type: None, Broadcast, Multicast, Unknown
Unicast, Broadcast + Multicast, Broadcast + Unknown Unicast, Multicast + Unknown
Unicast, and Broadcast + Multicast + Unknown Unicast.
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 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.
This function cannot be implemented in the hardware mode. (When Drop is chosen
for the Action parameter)
Use the drop-down menu to enable or disable the function. If enabled, the traffic
control states are logged when a storm occurs and when a storm is cleared. If the
log state is disabled, the traffic control events are not logged.
Enter the time allowed for auto recovery from shutdown for a port. The default value
is 0, which means there is no auto recovery and the port remains in shutdown
forever mode. This requires manual entry of the CLI command config ports
[ <portlist> | all ] state enable to return the port to a forwarding state.
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