Xblue Networks X-50 - Manual (Page 134)

Advanced Programming
134 XBLUE Networks
7
Qual
ity of Service (QoS)
Click on “Add” create a new QoS rule.
Default DSCP Mark
DSCP - Differentiated Services Code Point - is a 6-bit field in the IP header, used for QoS Classification. If it is set to
“No Change” or “Best Effort” then no QoS will take place.
•
Default DSCP Mark - Using the drop down menu, select the protocol that will be identified for QOS
processing.
•
Signaling DSCP Mark - Using the drop down menu, select how the protocol will be modified for
processing.
•
RTP DSCP Mark - Using the drop down menu, select what order the packets will be processed.
•
CS - Class Selector - Prior to the use of Assured Forwarding Classes, Class Selector was used. Class
Selector, is not very flexible because it uses the Precedence field in the Type of Service to prioritize
packets.
•
Expedited Forwarding has the characteristics of low delay, low loss, and low jitter, making it suitable for
Voice, Video and other real-time services. To avoid larger delays, it is important not to use Expedited
Forwarding for more than 1/3 of the network traffic.