Traffic Control Settings - D-Link xStack DGS-3620 Series Reference Manual

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
From Port / To Port
From Queue / To Queue
Min Rate Mode
Rate (8-10240000)
Percent
Max Rate Mode
Rate (8-10240000)
Percent
Click the Apply button to accept the changes made.
NOTE: The minimum granularity of queue bandwidth control is 8Kbit/sec. The system will adjust the
number to the multiple of 8 automatically.

Traffic Control Settings

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 due to a malicious end station 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.
Packet storms are monitored to determine if too many packets are flooding the network based on threshold levels
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 window 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 shut down the port to all incoming traffic, with the exception of STP BPDU packets, for a time period
specified using the Count Down parameter.
If a Time Interval parameter times-out for a port configured for traffic control and a packet storm continues, that port
will be placed in Shutdown Forever mode, which will cause a warning message to be sent to the Trap Receiver.
Once in Shutdown Forever mode, the method of recovering the port is to manually recoup it using the System
Configuration > Port configuration > Port Settings window or automatic recovering after the time period that is
Use the drop-down menu to select the port range to use for this configuration.
Use the drop-down menu to select the queue range to use for this configuration.
Selec the minimum rate mode option here. Options to choose from are Rate and
Precent.
After selecting the Rate option as the Min Rate Mode, the following parameter will
be available. Enter the minimum packet rate limit value that the ports are allowed to
receive here. This value must be between 8 and 10240000 Kbps. Tick the No limit
option to have unlimited rate of packets received by the specified queue.
After selecting the Percent option as the Min Rate Mode, the following parameter
will be available. Enter the minimum packet rate limit percentage value that the
ports are allowed to receive here. This value must be between 1 and 100 percent
(%).
Selec the maximum rate mode option here. Options to choose from are Rate and
Precent.
After selecting the Rate option as the Max Rate Mode, the following parameter will
be available. Enter the maximum packet rate limit value that the ports are allowed
to receive here. This value must be between 8 and 10240000 Kbps. Tick the No
limit option to have unlimited rate of packets received by the specified queue.
After selecting the Percent option as the Max Rate Mode, the following parameter
will be available. Enter the maximum packet rate limit percentage value that the
ports are allowed to receive here. This value must be between 1 and 100 percent
(%).
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