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Limitation List
Start IP
End IP
Each /Shared
TX limit
RX limit
Add
Edit
Delete
Index (1-15) in Schedule
Setup
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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
other applications are not protected by QoS, it will detract much from their performance in the
overcrowded network. This is especially essential to those are low tolerant of loss, delay or
jitter (delay variation).
Another reason is due to congestions at network intersections where speeds of interconnected
circuits mismatch or traffic aggregates, packets will queue up and traffic can be throttled back
to a lower speed. If there's no defined priority to specify which packets should be discarded
(or in another term "dropped") from an overflowing queue, packets of sensitive applications
mentioned above might be the ones to drop off. How this will affect application performance?
There are two components within Primary configuration of QoS deployment:
Classification: Identifying low-latency or crucial applications and marking them for
high-priority service level enforcement throughout the network.
Scheduling: Based on classification of service level to assign packets to queues and
associated service types
The basic QoS implementation in Vigor routers is to classify and schedule packets based on
the service type information in the IP header. For instance, to ensure the connection with the
Vigor3200 Series User's Guide
Display a list of specific limitations that you set on this web
page.
Define the start IP address for limit bandwidth.
Define the end IP address for limit bandwidth.
Select Each to make each IP within the range of Start IP and
End IP having the same speed defined in TX limit and RX
limit fields; select Shared to make all the IPs within the range
of Start IP and End IP share the speed defined in TX limit and
RX limit fields.
Define the limitation for the speed of the upstream. 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.
Define the limitation for the speed of the downstream. 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 the specific speed limitation onto the list above.
Allow you to edit the settings for the selected limitation.
Remove the selected settings existing on the limitation list.
You can type in four sets of time schedule for your request. All
the schedules can be set previously in Application >>
Schedule web page and you can use the number that you have
set in that web page.
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