Traffic Control Commands - D-Link DES-3010F Command Line Interface Manual

On a computer network, packets such as Multicast packets and Broadcast packets continually flood the network as normal
procedure. At times, this traffic may increase do to a malicious endstation on the network or a malfunctioning device, such as a
faulty network card. Thus, switch throughput problems will arise and consequently affect the overall performance of the switch
network. To help rectify this packet storm, the Switch will monitor and control the situation.
The packet storm is monitored to determine if too many packets are flooding the network, based on the threshold level provided
by the user. Once a packet storm has been detected, the Switch will drop packets coming into the Switch until the storm has
subsided. This method can be utilized by selecting the drop option of the action parameter in the config traffic control command
below. The Switch will also scan and monitor packets coming into the Switch by monitoring the Switch's chip counter. This
method is only viable for Broadcast and Multicast storms because the chip only has counters for these two types of packets. Once
a storm has been detected (that is, once the packet threshold set below has been exceeded), the Switch will shutdown the port to
all incoming traffic with the exception of STP BPDU packets, for a time period specified using the countdown parameter. If this
field times out and the packet storm continues, the port will be placed in a Shutdown Forever mode which will produce a warning
message to be sent to the Trap Receiver. Once in Shutdown Forever mode, the only method of recovering this port is to manually
recoup it. To utilize this method of Storm Control, choose the shutdown option of the config traffic control command shown
below.
The broadcast storm control commands in the Command Line Interface (CLI) are listed (along with the appropriate parameters) in
the following table.
Command
config traffic control
config traffic trap
show traffic control
Each command is listed, in detail, in the following sections.
config traffic control
Purpose
Syntax
Description
Parameters
DES-3000 Series Layer 2 Switch CLI Reference Manual
Parameters
[<storm_grouplist> | all] {broadcast [enable | disable] | multicast
[enable | disable] | unicast [enable | disable] | action [drop |
shutdown] | threshold <value 64-1000000> | time_interval <value 5-
30> | countdown [<value 0> | <value 5-30>]}
[none | storm_occurred | storm_cleared | both]
{<storm_grouplist>}
Used to configure broadcast/multicast traffic control.
config traffic control [<storm_grouplist> | all] {broadcast [enable |
disable] | multicast [enable | disable] | unicast [enable | disable] | action
[drop | shutdown] | threshold <value 64-1000000> | time_interval <value
5-30> | countdown [<value 0> | <value 5-30>]}
This command is used to configure traffic control.
<storm_grouplist>  Used to specify a port or range of ports to be configured
for traffic control.
all  Specifies all ports are to be configured for traffic control on the Switch.
broadcast [enable | disable]  Enables or disables broadcast storm control.
multicast [enable | disable]  Enables or disables multicast storm control.
unicast [enable | disable]  Enables or disables unicast traffic control.
action – Used to configure the action taken when a storm control has been
detected on the Switch. The user has two options:

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
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