User`s guide

Vigor2850 Series User’s Guide
198
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.
WAN Inbound
Bandwidth
It allows you to set the connecting rate of data input for
WAN2/WAN3. For example, if your ADSL supports 1M of
downstream and 256K upstream, please set 1000kbps for this
box. The default value is 10000kbps.
WAN Outbound
Bandwidth
It allows you to set the connecting rate of data output for
WAN2/WAN3. For example, if your ADSL supports 1M of
downstream and 256K upstream, please set 256kbps for this
box. The default value is 10000kbps.
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
It is reserved for the group index in the form of ratio of
reserved bandwidth to upstream speed and reserved
bandwidth to downstream speed.
Enable UDP Bandwidth
Control
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.
Outbound TCP ACK
Prioritize
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.
Limited_bandwidth Ratio
The ratio typed here is reserved for limited bandwidth of UDP
application.