D-Link xStack Reference Manual page 137

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xStack DGS-3200 Series Layer 2 Managed Gigabit Ethernet Switch Web UI Reference Guide
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. To utilize this method of
Storm Control, choose the Shutdown option of the Action parameter in the window below.
Use this window to enable or disable storm control and adjust the threshold for multicast and broadcast storms.
To view the following window, click QoS > Traffic Control:
To configure Traffic Control, set the parameters described in the table below:
Parameter
From Port / To Port Use the drop-down menus to select a range of ports to be configured.
Action Select the method of traffic control from the drop-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 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 user manually resets the port
using the Port Settings window (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.
Count Down (0 or
The Count Down timer is set to determine the amount of time, in minutes, that the Switch will wait
5-30) 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 5 to 30
Figure 5 - 4. Traffic Control window
Description
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