shaping-rate (Oversubscribing an Interface)
Syntax
Hierarchy Level
Release Information
Statement introduced in Junos OS Release 7.6.
Option burst-size introduced for Enhanced Queuing (EQ) DPCs in Junos OS Release 9.4.
Option burst-size option introduced for MPC/MIC modules in Junos OS Release 11.4.
Description
For Gigabit Ethernet IQ, Channelized IQ PICs, FRF.15 and FRF.16 LSQ interfaces, EQ DPCs, and MPC/MIC modules only, configure a shaping rate for a logical interface. You can also configure an optional burst size for a logical interface on EQ DPCs. This can help to make sure higher-priority services do not starve lower-priority services.
For physical interfaces on T4000 routers with Type 5 FPCs, configure traffic shaping rate.
The sum of the shaping rates for all logical interfaces on the physical interface can exceed the physical interface bandwidth. This practice is known as oversubscription of the peak information rate (PIR).
Default
The default behavior depends on various factors. For more information, see Oversubscribing Interface Bandwidth.
Options
percent percentage—For LSQ interfaces, shaping rate as a percentage of the available interface bandwidth.
Range: 1 through 100 percent
rate—For IQ and IQ2 interfaces, and T4000 routers with Type 5 FPCs, 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: IQ and IQ2 interfaces—1000 through 160,000,000,000 bps
Range: T4000 routers with Type 5 FPCs—the shaping rate value for the physical interface must be a minimum of 292 Kbps. The maximum value of shaping-rate is limited by the maximum transmission rate of the interface.
burst-size bytes—(Optional) 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.
