Bug ID 481663: Disable isession control channel on demand.

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5

Fixed In:
12.0.0, 11.6.0 HF6, 11.5.1 HF6, 11.4.1 HF9

Opened: Sep 29, 2014
Severity: 3-Major


Customers running into isession related issues.


TMM could run out of memory because of these issues.


This happens when APM has been running.


This issue has no workaround at this time.

Fix Information

If customer does not need optimized tunnels, app tunnels, remote desktop then he can safely disable the db variable "isession.ctrl.apm" which disables isession. Then do "bigstart restart tmm apd" so that the db variable takes effect.

Behavior Change