Bug ID 926549: AFM rule loops when 'Send to Virtual' is used with Virtual Server iRule 'LB::reselect'

Last Modified: Sep 16, 2020

Bug Tracker

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

Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 16.0.0, 16.0.0.1

Opened: Jul 13, 2020
Severity: 3-Major

Symptoms

With some configurations, executing a command such as 'tmsh show security firewall global-rules active' loops continuously, causing stat counters to rise, and possibly log messages to be written to /var/log/ltm.

Impact

The iRule loops continuously, causing stat counters to rise, and possibly logging messages in /var/log/ltm.

Conditions

-- AFM is routing traffic to a Virtual Server through the 'Send to Virtual' option. -- The target Virtual Server uses the 'LB_FAILED' iRule to select a new Virtual Server through virtual command and 'LB::reselect'.

Workaround

This configuration should be avoided, but if it is used, and if this does happen, you can restart tmm: bigstart restart tmm This stops the current looping, until it is triggered again. Impact of workaround: Traffic disrupted while tmm restarts.

Fix Information

None

Behavior Change