Dell 53-1002116-01 Traffic class mapping, Applying a CoS-to-CoS mutation QoS map, Unicast traffic

Queueing 10

Applying a CoS-to-CoS mutation QoS map

To apply a CoS-to-CoS mutation QoS map, perform the following steps from Privileged EXEC mode. 1. Enter global configuration mode.

switch#configure terminal

2. Specify the 10-gigabit Ethernet interface.

switch(config)#interface intengigabitethernet 0/2

3.Activate or apply changes made to the CoS-to-CoS mutation QoS map name. In this example ‘test’ is used.

switch(conf-if-te-0/2)#qos map cos-mutation test

4.Specify the trust mode for incoming traffic.

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

5. Exit the configuration mode and return to EXEC mode.

switch(conf-if-te-0/2)#exitswitch(config)#end

6. Enter the copy command to save the running-config file to the startup-config file.

switch#copy running-config startup-config

Traffic class mapping

The Dell M8428-k 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:

•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.

Unicast traffic

Table 18 presents the Layer 2 default traffic class mapping supported for a COS-based user priority to conform to 802.1Q default mapping.

TABLE 18	Default user priority for unicast traffic class mapping
User priority	Traffic class
0	1
1	0
2	2

Dell Converged Enhanced Ethernet Administrator’s Guide	97
53-1002116-01