Bug ID 627433: HSB transmitter failure on i2x00 and i4x00 platforms

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2

Fixed In:
13.0.0, 12.1.2 HF1

Opened: Nov 08, 2016
Severity: 1-Blocking
Related Article:


On the BIG-IP i2x00 and i4x00 platforms, tmm enters an infinite 'restart' loop after a 'bigstart restart' or 'bigstart restart tmm' command if traffic is actively flowing through the TMM. This is the result of an HSB transmitter failure.


Traffic disrupted while tmm restarts.


Traffic actively flowing through the tmm and you issue 'bigstart restart' or 'bigstart restart tmm'. Another instance occurs when syncing the datasync-global-dg device-group for an HA configuration on iSeries platforms.


Ensure all traffic is stopped before issuing the 'bigstart restart' or 'bigstart restart tmm' commands. Set HSB::failures_before_reset in /config/tmm_init.tcl to a high value, such as 1000 (default is 50) may resolve the issue, depending on the conditions this issue occurred.

Fix Information

TMM restart loop no longer occurs following 'bigstart restart' on i2x00 and i4x00 platforms.

Behavior Change