Switch Setup Dscp Screen - ZyXEL Communications MSC1000G User Manual

Chapter 13 Switch Screens

13.9 Switch Setup DSCP Screen

DSCP (Differentiated Services Code Point) is a field in the header of IP packets for packet
classification purposes. The QoS (Quality-of-Service) in the MSC uses DSCP to provide different
level of services and priorities for downstream data transmission.
IEEE 802.1p enables the MSC transmit frames according to their 3-bit priority (0~7) in an 802.1q
header. Frames with higher priority are served first.
Click Switch > Switch Setup > DSCP to display the screen as shown. Use this screen to overwrite
the IEEE 802.1p priority value of traffic received through the Gigabit Ethernet interfaces based on
its DSCP value.
Figure 354 Switch Setup DSCP
The following table describes the labels in this screen.
Table 274 Switch Setup DSCP
LABEL
Enable
Apply
Cancel
DSCP mapping
(codepoint/
priority)
Apply
Cancel
520
DESCRIPTION
Select this to overwrite the IEEE 802.1p priority value of traffic received through the Gigabit
Ethernet interfaces based on its DSCP value.
Click Apply to save the changes in this section of the screen to the system's volatile
memory. The system loses these changes if it is turned off or loses power, so use the
Config Save link on the navigation panel and then the Save button to save your changes
to the non-volatile memory when you are done configuring.
Click Cancel to begin configuring this screen afresh.
Set the IEEE 802.1p priority (0~7) to use for downstream traffic with each DSCP code point
service level (0~63).
Click Apply to save the changes in this section of the screen to the system's volatile
memory. The system loses these changes if it is turned off or loses power, so use the
Config Save link on the navigation panel and then the Save button to save your changes
to the non-volatile memory when you are done configuring.
Click Cancel to begin configuring this screen afresh.
Management Switch Card User's Guide