Diffserv Network Example; Dscp-To-Ieee 802.1P Priority Settings; Activating Diffserv; Figure 86 Diffserv Network - ZyXEL Communications Dimension GS-2024 User Manual

Chapter 22 Differentiated Services

22.1.2 DiffServ Network Example

The following figure depicts a DiffServ network consisting of a group of directly connected
DiffServ-compliant network devices. The boundary node (A in
network classifies (marks with a DSCP value) the incoming packets into different traffic flows
(Platinum, Gold, Silver, Bronze) based on the configured marking rules. A network
administrator can then apply various traffic policies to the traffic flows. For example, one
traffic policy would be to give higher drop precedence to one traffic flow over others. In our
example packets in the Bronze traffic flow are more likely to be dropped when congestion
occurs than the packets in the Platinum traffic flow as they move across the DiffServ network.

Figure 86 DiffServ Network

22.2 DSCP-to-IEEE 802.1p Priority Settings

You can configure the DSCP to IEEE 802.1p mapping to allow the Switch to prioritize all
traffic based on the incoming DSCP value according to the DiffServ to IEEE 802.1p mapping
table.
The following table shows the default DSCP-to-IEEE802.1p mapping.

Table 55 Default DSCP-IEEE 802.1p Mapping

DSCP VALUE 0 – 7
IEEE 802.1p

22.3 Activating DiffServ

Activate DiffServ to apply marking rules or IEEE 802.1p priority mapping on the selected
port(s).
Click IP Application > DiffServ in the navigation panel to display the screen as shown.
164
A
S
P G S B
P - Platinum
G - Gold
S - Silver
B - Bronze
8 – 15
0 1
G P P
S
B
B
16 – 23 24 – 31 32 – 39
2 3 4
Figure 86) in a DiffServ
S
G P P
40 – 47 48 – 55 56 – 63
5 6 7
GS-2024 User's Guide