Technical Documentation

vbr

Syntax

vbr peak rate sustained rate burst length;

Hierarchy Level

[edit interfaces interface-name atm-options vpi vpi-identifier shaping],[edit interfaces interface-name unit logical-unit-number address address family family multipoint-destination address shaping ],[edit interfaces interface-name unit logical-unit-number shaping ],[edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number address address family family multipoint-destination address shaping ],[edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number shaping ]

Release Information

Statement introduced before Junos OS Release 7.4.

Description

For ATM encapsulation only, define the variable bandwidth utilization in the traffic-shaping profile.

When you configure the variable bandwidth utilization, you must specify all three options (burst, peak, and sustained). You can specify the rate 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). You can also specify the rate in cells per second by entering a decimal number followed by the abbreviation c; values expressed in cells per second are converted to bits per second by means of the formula 1 cps = 384 bps.

Default

If the vbr statement is not specified, bandwidth utilization is unlimited.

Options

burst length—Burst length, in cells. If you set the length to 1, the peak traffic rate is used.

Range: 1 through 4000 cells

peak rate—Peak rate, in bits per second or cells per second.

Range: For ATM1 interfaces, 33 Kbps through 135.6 Mbps (ATM OC3); 33 Kbps through 276 Mbps (ATM OC12). For ATM2 IQ OC3 and OC12 interfaces, 33 Kbps through 542,526,792 bps. For ATM2 IQ OC48 interfaces, 33 Kbps through 2,170,107,168 bps. For ATM2 IQ DS3 and E3 interfaces, from 33 Kbps through the maximum rate, which depends on the ATM encapsulation and framing you configure.

sustained rate—Sustained rate, in bits per second or cells per second.

Range: For ATM1 interfaces, 33 Kbps through 135.6 Mbps (ATM OC3); 33 Kbps through 276 Mbps (ATM OC12).

For ATM2 IQ OC3 and OC12 interfaces, 33 Kbps through 542,526,792 bps.

For ATM2 IQ OC48 interfaces, 33 Kbps through 2,170,107,168 bps.

For ATM2 IQ DS3 and E3 interfaces, from 33 Kbps through the maximum rate, which depends on the ATM encapsulation and framing you configure.

Required Privilege Level

interface—To view this statement in the configuration.

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

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