Draytek Vigor2820 Series User Manual page 122

Enable the QoS Control
WAN Inbound Bandwidth It allows you to set the connecting rate of data input for WAN.
WAN Outbound Bandwidth It allows you to set the connecting rate of data output for
Reserved Bandwidth Ratio It is reserved for the group index in the form of ratio of
Enable UDP Bandwidth
Control
Outbound TCP ACK
Prioritize
Limited_bandwidth Ratio
Online Statistics
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The factory default for this setting is checked.
Please also define which traffic the QoS Control settings will
apply to.
IN- apply to incoming traffic only.
OUT-apply to outgoing traffic only.
BOTH- apply to both incoming and outgoing traffic.
Check this box and click OK, then click Setup link again.
You will see the Online Statistics link appearing on this page.
For example, if your ADSL supports 1M of downstream and
256K upstream, please set 10000kbps for this box. The default
value is 10000kbps.
WAN. For example, if your ADSL supports 1M of
downstream and 256K upstream, please set 256kbps for this
box. The default value is 10000kbps.
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.
The ratio typed here is reserved for limited bandwidth of UDP
application.
Display an online statistics for quality of service for your
reference. This link will be seen only if you click OK in
WAN1/WAN2 General Setup web page and click Setup again
(for WAN1/WAN2) on the Bandwidth
Vigor2820 Series User's Guide