Scheduler Hierarchy Example

This section provides a more complete example of building a 4-level hierarchy of schedulers. The configuration parameters are shown in Figure 17. The queues are shown at the top of the figure with the other three levels of the hierarchy below.

Figure 17: Building a Scheduler Hierarchy

The figure's PIR values will be configured as the shaping rates and the CIRs will be configured as the guaranteed rate on the Ethernet interface ge-1/0/0. The PIR can be oversubscribed (that is, the sum of the children PIRs can exceed the parent's, as in svlan 1, where 200 + 200 + 100 exceeds the parent rate of 400)). However, the sum of the children node level's CIRs must never exceed the parent node's CIR, as shown in all the service VLANs (otherwise, the guaranteed rate could never be provided in all cases).

This configuration example will present all details of the CoS configuration for the interface in the figure (ge-1/0/0), including:

• Interface Sets for the Hierarchical Example
• Interfaces for the Hierarchical Example
• Traffic Control Profiles for the Hierarchical Example
• Schedulers for the Hierarchical Example
• Drop Profiles for the Hierarchical Example
• Scheduler Maps for the Hierarchical Example
• Applying Traffic Control Profiles for the Hierarchical Example

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