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Hierarchy Level


For MIC and MPC interfaces on MX Series routers, configure a shaping rate and optional burst size for low priority traffic. This can help to make sure higher priority services do not starve lower priority services.


Option burst-size is not supported on MPC5 interfaces. The burst-size configuration is allowed on these interfaces, but does not take effect.


If you do not include this statement, the default shaping rate for this priority is determined by the shaping-rate statement in the traffic control profile.


percent percentage—Specify the shaping rate as a percentage of the overall shaping rate.

  • Range: 1 through 100

rate—Peak rate, in bits per second (bps). You can specify a value in bits per second either as a complete decimal number or as a decimal number followed by the abbreviation k (1000), m (1,000,000), or g (1,000,000,000).

  • Range: 1000 through 6,400,000,000,000


    Through Junos OS Release 13.3, the upper limit is 160,000,000,000 bps. Beginning with Junos OS Release 14.1, the upper limit is 6,400,000,000,000 bps.

  • Default: None

burst-size bytes—Maximum burst size, in bytes.

  • Range: 0 through 1,000,000,000

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 10.1.

percent option added in Junos OS Release 19.3R1.