Draytek Vigor2820 Series User Manual page 142

WAN Inbound
Bandwidth
WAN Outbound
Bandwidth
Note: The rate of outbound/inbound must be smaller than the real bandwidth to ensure
correct calculation of QoS. It is suggested to set the bandwidth value for inbound/outbound
as 80% - 85% of physical network speed provided by ISP to maximize the QoS
performance.
Reserved Bandwidth
Ratio
Enable UDP Bandwidth
Control
Outbound TCP ACK
Prioritize
Limited_bandwidth Ratio The ratio typed here is reserved for limited bandwidth of UDP
E E d d i i t t t t h h
The first three (Class 1 to Class 3) class rules can be adjusted for your necessity. To add, edit
or delete the class rule, please click the Edit link of that one.
After you click the Edit link, you will see the following page. Now you can define the name
for that Class. In this case, "Test" is used as the name of Class Index #1.
Vigor2820 Series User's Guide
It allows you to set the connecting rate of data input for WAN.
For example, if your ADSL supports 1M of downstream and
256K upstream, please set 1000kbps for this box. The default
value is 10000kbps.
It allows you to set the connecting rate of data output for
WAN. For example, if your ADSL supports 1M of
downstream and 256K upstream, please set 256kbps for this
box. The default value is 10000kbps.
It is reserved for the group index in the form of ratio of
reserved bandwidth to upstream speed and reserved
bandwidth to downstream speed.
Check this and set the limited bandwidth ratio on the right
field. This is a protection of TCP application traffic since UDP
application traffic such as streaming video will exhaust lots of
bandwidth.
The difference in bandwidth between download and upload are
great in ADSL2+ environment. For the download speed might
be impacted by the uploading TCP ACK, you can check this
box to push ACK of upload faster to speed the network traffic.
application.
e e C C l l a a s s s s R R u u l l e e f f o o r r Q Q o o S S
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