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Hierarchy Level


Specify the method of sharing excess bandwidth in a hierarchical scheduler environment. With hierarchical schedulers, you can provide shaping and scheduling at the service VLAN level as well as other levels, such as the physical interface. You can also group a set of logical interfaces and then apply scheduling and shaping parameters to the logical interface set.

To configure CoS hierarchical schedulers, you must enable hierarchical scheduling by including the hierarchical-scheduler statement at the [edit interfaces] hierarchy for the physical interface. If you do not include this statement, the interfaces on the MX Series router cannot use hierarchical interfaces.

The Enhanced Queuing DPC supports the following hierarchical scheduler characteristics:

  • Shaping at the physical interface level

  • Shaping and scheduling at the service VLAN interface set level

  • Shaping and scheduling at the customer VLAN logical interface level

  • Scheduling at the queue level



Share excess bandwidth equally among the configured interfaces.

proportional value

(Default) Share excess bandwidth proportionally according to the specified value. In this mode, the excess bandwidth is shared at the ratio of the logical interface shaping rates.

  • Default: 32.64 Mbps

This example sets the excess bandwidth sharing for an Enhanced Queuing DPC interface proportionally at a rate of 100 Mbps and a shaping rate of 80 Mbps applied to the interface through the output-traffic-control profile for scheduling and shaping:

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 8.5.