Configuring Qos General Screen; Figure 48 Advanced > Quality Of Service; Table 34 Advanced > Quality Of Service - ZyXEL Communications P-663H-51 User Manual

DSCP is backward compatible with the three precedence bits in the ToS octet so that non-
DiffServ compliant, ToS-enabled network device will not conflict with the DSCP mapping.
The DSCP value determines the forwarding behavior, the PHB (Per-Hop Behavior), that each
packet gets across the DiffServ network. Based on the marking rule, different kinds of traffic
can be marked for different kinds of forwarding. Resources can then be allocated according to
the DSCP values and the configured policies.

9.2 Configuring QoS General Screen

Click Advanced > Quality of Service to open the screen as shown next.
Use this screen to enable or disable QoS, and select a DSCP mark to use on all outgoing
packets that do not match a QoS classification rule.
Figure 48 Advanced > Quality of Service
The following table describes the labels in this screen.
Table 34 Advanced > Quality of Service
LABEL
Enable QoS
Select
Default
DSCP Mark
Save/Apply
P-663H-51 User's Guide
DSCP (6 bits)
DESCRIPTION
Select the check box to turn on QoS to improve your network performance.
You can give priority to traffic that the ZyXEL Device forwards out through the WAN
interface. Give high priority to voice and video to make them run more smoothly.
Similarly, give low priority to many large file downloads so that they do not reduce the
quality of other applications.
Select a DSCP mark to use on all outgoing packets that do not match a QoS
classification rule. You can select a specific DSCP mark to use or have the ZyXEL
Device automatically select a DSCP mark to use.
Click this button to save the changes and have the ZyXEL Device start using them.
Chapter 9 Quality of Service (QoS)
Unused (2 bits)
91