Brocade Communications Systems 53-1002163-02 manual Multicast queue scheduling

CEE map configuration 11

2. Specify the schedule to use and the traffic class to bandwidth mapping.

switch(config)#qos queue scheduler strict-priority 4 dwrr 10 20 30 40

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

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

Multicast queue scheduling

The multicast traffic classes are numbered from 0 to 3; higher numbered traffic classes are considered higher priority. A fixed mapping from multicast traffic class to equivalent unicast traffic class is applied to select the queue scheduling behavior. Table 28 presents the multicast traffic class equivalence mapping applied.

TABLE 28	Multicast traffic class equivalence mapping
Multicast traffic class		Equivalent unicast traffic class
3		6
2		4
1		2
0		0

Once the multicast traffic class equivalence mapping has been applied, then scheduling and any scheduler configuration are inherited from the equivalent unicast traffic class. See Table 27 on page 118 for details on exact mapping equivalencies.

Unicast ingress and egress queueing utilizes a hybrid scheduler that simultaneously supports SP+WRR service and multiple physical queues with the same service level. Multicast adds additional multicast expansion queues. Since multicast traffic classes are equivalent to unicast service levels, they're treated exactly as their equivalent unicast service policies.

Scheduling the QoS multicast queue

To schedule the QoS multicast queue, perform the following steps from privileged EXEC mode. 1. Enter global configuration mode.

switch#configure terminal

2. Specify the schedule to use and the traffic class to bandwidth mapping.

switch(config)#qos queue multicast scheduler dwrr 10 20 30 40

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

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

CEE map configuration

The CEE QoS covers frame classification, priority and traffic class (queue) mapping, congestion control, and scheduling. Under the CEE Provisioning model all of these features are configured utilizing two configuration tables, Priority Group Table and Priority Table.

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