D-Link DGS-3100-24 User Manual Page 128

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DGS-3100 Series Gigabit Stackable Managed Switch User Manual
11
4
Configuring Storm Control
Storm control limits the amount of Multicast, Broadcast and Unknown Unicast frames accepted and forwarded by the
device. When Layer 2 frames are forwarded, Broadcast, Multicast and Unknown Unicast frames are flooded to all ports on
the relevant VLAN. This occupies bandwidth, and loads all nodes on all ports.
A Broadcast Storm is a result of an excessive amount of broadcast messages simultaneously transmitted across a network by
a single port. Forwarded message responses are heaped onto the network, straining network resources or causing the
network to time out.
1. Click Qos > Traffic Control. The Traffic Control Settings Page opens:
Figure 4-3. Traffic Control Settings Page
The Traffic Control Settings Page contains the following fields:
Field Description
Unit
Defines the stacking member for which the storm control parameters are displayed.
From Port
Defines from which port storm control is configureed.
To Port
Defines to which port storm control is configured.
Storm Control Type
Specifies the Broadcast mode currently enabled on the device. The possible field values are:
Broadcast Storm
Broadcast and Multicast Storm
Broadcast, Multicast and Unknown Unicast Storm
State
Indicates which storm control is enabled on the port. The possible field values are:
Enable — Enables storm control on the selected port.
Disable — Disables storm control on the selected port. (This is the default value)
Threshold (3500-
1000000)
Indicates the maximum rate (kilobits per second) at which ‘storm’ packets are forwarded. The
range is 3500 -1,000,000. The default value is 3,500.
2. Define the Unit, From Port, To Port, Storm Control Type, State, and Threshold fields.
3. Click
. The storm control settings are configured, and the device is updated.
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