Diffserv Traffic Classification - 3Com 3C17300-US Implementation Manual

You cannot alter the mapping of priority levels 0 - 7 to the traffic queues.
These priority levels are fixed to the traffic queues as shown in
Figure 13 IEEE 802.1D traffic types
Figure 13
levels and how they are mapped to the two supported traffic queues.
The 802.1D service level of the packet is not altered by the Switch 4200
Series.
DiffServ traffic DiffServ is an alternative method of classifying traffic so that different
classification levels of service can be applied to it on a network. DiffServ is a layer 3
function; and the service to be applied is contained within the DSCP field,
which is in the IP header of a packet.
Classification
Ingress Port
802.1D
illustrates IEEE 802.1D traffic types as well as associated priority
How Traffic Prioritization Works
802.1p
Service levels
Best effort 0
Queue Scheduling
Background 1
2
Spare
3
Business Critical
4
Multimedia
Video 5
6
Voice
Network Control 7
Figure
Strict Priority
Low Priority Queue
Egress Port
High Priority Queue
53
13.