Bug ID 812377: The rate class feature does not honor the Burst Size setting.

Last Modified: Oct 04, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
15.0.0, 14.1.0, 14.0.0, 13.1.1, 13.1.0, 13.0.1, 13.0.0, 11.6.3.4, 11.6.3.3, 11.6.3.2, 11.5.9, 11.5.8, 11.5.7, 11.5.6, 11.5.5

Opened: Aug 05, 2019
Severity: 4-Minor

Symptoms

The Burst Size setting is intended to specify the maximum number of bytes that traffic is allowed to burst beyond the base rate configured for the rate class. When the burst rate is set to zero, no bursting is allowed. In this release, the Burst Size setting has no effect, even though neither the GUI nor tmsh prevent you from configuring.

Impact

Traffic does not burst beyond the base rate configured for the rate class. In the case of hierarchical rate classes, the BIG-IP may temporarily fail to process traffic.

Conditions

This occurs when attempting to use the burst setting in the following BIG-IP software versions, and later: -- 13.0.0 through 13.1.1.5 -- 12.1.2 through 12.1.4.1 -- 11.5.5 through 11.5.9 -- 11.6.3.2 through 11.6.3.4

Workaround

None.

Fix Information

None

Behavior Change