Brocade Communications Systems 53-1002163-02 Multicast traffic, Mapping CoS-to-Traffic-Class

11 Queueing

Multicast traffic

Fabric OS v7.0.0supports four multicast traffic classes for isolation and to control servicing for different priorities of application data. Traffic classes are numbered from 0 through 3, with higher values designating higher priority. The traffic class mapping stage provides some flexibility in queue selection.

Table 26 presents the Layer 2 default traffic class mapping supported for a COS-based user priority to conform to 802.1Q default mapping.

TABLE 26	Default user priority for multicast traffic class mapping
User Priority	Traffic class
0	0
1	0
2	1
3	1
4	2
5	2
6	3
7	3

Once the traffic class mapping has been resolved for ingress traffic, it is applied consistently across all queueing incurred on the ingress and egress ports.

Mapping CoS-to-Traffic-Class

To map a CoS-to-Traffic-Class, perform the following steps from privileged EXEC mode. 1. Enter global configuration mode.

switch#configure terminal

2. Create the CoS-Traffic-Class mapping by specifying a name and the mapping.

switch(config)#qos map cos-traffic-class test 1 0 2 3 4 5 6 7

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

switch(config)#do copy running-config startup-config

Activating a mapping CoS-to-Traffic-Class

To activate a CoS-to-traffic class mapping, 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 tengigabitethernet 0/2

3. Activate the CoS-to-Traffic-Class mapping by name.

switch(conf-if-te-0/2)#qos cos-traffic-class test

112	Converged Enhanced Ethernet Administrator’s Guide
	53-1002163-02