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  buffer-size (percent percentage | remainder | temporal microseconds | $junos-cos-scheduler-bs);

Hierarchy Level

  [edit dynamic-profiles profile-name class-of-service schedulers scheduler-name]

Release Information

Statement introduced before JUNOS Release 7.4.

The [edit dynamic-profiles profile-name ] hierarchy added in JUNOS Release 9.3.

The $junos-cos-scheduler-bs predefined variable added in JUNOS Release 9.4.


Specify buffer size.


If you do not include this statement, the default scheduler transmission rate and buffer size percentages for queues 0 through 7 are 95, 0, 0, 5, 0, 0, 0, and 0 percent.


percent percentage —Buffer size as a percentage of total buffer.

remainder—Remaining buffer available.

temporal microseconds —Buffer size as a temporal value. The queuing algorithm starts dropping packets when it queues more than a computed number of bytes. This maximum is computed by multiplying the logical interface speed by the configured temporal value.

Range: The ranges vary by platform as follows:
  • For IQ PICs on T Series routers and M320 routers: 1 through 50,000 microseconds.
  • For IQ PICs on other M Series routers: 1 through 100,000 microseconds.
  • For other M Series routers: 1 through 200,000 microseconds.

$junos-scheduler-bx—JUNOS predefined variable that is replaced with the buffer size obtained from the RADIUS server when a subscriber authenticates over the subscriber interface to which the subscriber access dynamic profile is attached.

Required Privilege Level

interface—To view this statement in the configuration.

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

Published: 2009-07-07

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