ZyXEL Communications P-660H-D Series - Manual (Page 171)

P-660R/H-D Series User’s Guide
Chapter 16 Media Bandwidth Management Advanced Setup 170
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.
Figure 82 DiffServ: Differentiated Service Field
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 priorities of forwarding. Resources can then be allocated
according to the DSCP values and the configured policies.
16.12.2 Media Bandwidth Management Class Configuration
Configure a bandwidth management class in the Class Configuration screen. You must use
the Media Bandwidth Management - Summary screen to enable bandwidth management on
an interface before you can configure classes for that interface.
Refer to Section 16.1 on page 160 for more information.
To add a child class, click Media Bandwidth Management, then Class Setup. Click the Add
Child-Class button to open the following screen.
DSCP
(6-bit) Unused
(2-bit)