ZyXEL Communications MES-3528 - Diffserv Network Example; Activating Diffserv

Chapter 30 Differentiated Services
MES-3528 User’s Guide
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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.
30.1.2 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 Figure
141) in a DiffServ 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. An example traffic policy, is 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 141 DiffServ Network
30.2 Activating DiffServ
Activate DiffServ to apply marking rules or IEEE 802.1p priority mapping on the
Switch.
G
S
B
P
S
B
B
G
P
P
S
P - Platinum
G - Gold
S - Silver
B - Bronze
G
P
P
S
A