Traffic Class Mapping; Table 25 Default User Priority For Unicast Traffic Class Mapping - Brocade Communications Systems Converged Enhanced Ethernet 8000 Administrator's Manual

3. Activate or apply changes made to the CoS-to-CoS mutation QoS map name. In this example
4. Specify the trust mode for incoming traffic.
5. Enter the copy command to save the running-config file to the startup-config file.

Traffic class mapping

Fabric OS v7.0.0 supports eight unicast traffic classes for isolation and to control servicing for
different priorities of application data. Traffic classes are numbered from 0 through 7, with higher
values designating higher priority.
The traffic class mapping stage provides some flexibility in queue selection:
•
•
Unicast traffic
Table 25
to conform to 802.1Q default mapping.
TABLE 25
User priority
0
1
2
3
4
5
6
7
You are allowed to override these default traffic class mappings per port. Once the traffic class
mapping has been resolved it is applied consistently across any queueing incurred on the ingress
and the egress ports.
Converged Enhanced Ethernet Administrator's Guide
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'test' is used.
switch(conf-if-te-0/2)#qos map cos-mutation test
Use this command to specify the interface ingress QoS trust mode, which controls user priority
mapping of incoming traffic. The untrusted mode overrides all incoming priority markings with
the Interface Default CoS. The CoS mode sets the user priority based on the incoming CoS
value, if the incoming packet is not priority tagged, then fallback is to the Interface Default CoS
value.
switch(conf-if-te-0/2)#qos trust cos
switch(conf-if-te-0/2)#do copy running-config startup-config
The mapping may be many-to-one, such as mapping one byte user priority (256 values) to eight
traffic classes.
There may be a non-linear ordering between the user priorities and traffic classes.
presents the Layer 2 default traffic class mapping supported for a COS-based user priority
Default user priority for unicast traffic class mapping
Traffic class
1
0
2
3
4
5
6
7
11
Queueing
111