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Vigor2130 Series User’s Guide
139
system will use the default speed for the specific limitation you
set for each index.
RX Limit Define the limitation for the speed of the downstream to be
applied as specific limitation. If you do not set the limit in this
field, the system will use the default speed for the specific
limitation you set for each index.
Add Add the specific speed limitation onto the list above.
Edit Allows you to edit the settings for the selected limitation.
Delete Remove the selected settings existing on the limitation list.
When you finish adding a new bandwidth limit, simply click OK. The following page will
appear for you to check.
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A policer can limit the bandwidth of received frames. It is located in front of the ingress queue.
And a shaper can limit the bandwidth of transmitted frames. It is located after the ingress
queues. This page allows you to configure the switch port rate limit for Policers and Shapers.
Port Represent LAN or WAN interface.
Policer Enabled Check this box to enable policer function.
Policer Rate(Rx) Type the number for policer function. The default value is 500.
It is restricted to 500-1000000 when the Policer Unit is set in
kbps, and it is restricted to 1-1000 when the Policer Unit is set
in Mbps.
Policer Unit Determine the unit (kbps/Mbps) for policer.
Shaper Enabled Check this box to enable shaper function.
Shaper Rate (Tx) Type the number for shaper function. The default value is 500.
It is restricted to 500-1000000 when the Shaper Unit is set in
kbps, and it is restricted to 1-1000 when the Shaper Unit is set
in Mbps.
Shaper Unit Determine the unit (kbps/Mbps) for shaper function.
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Deploying QoS (Quality of Service) management to guarantee that all applications receive the
service levels required and sufficient bandwidth to meet performance expectations is indeed
one important aspect of modern enterprise network.
One reason for QoS is that numerous TCP-based applications tend to continually increase their
transmission rate and consume all available bandwidth, which is called TCP slow start. If