Bug ID 428884: MBLB proxy incorrectly detects iRule running state causing SNAT iRule for SIP to intermittently select self IP instead of configured IP

Last Modified: Jul 12, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
11.4.0, 11.4.1

Fixed In:
11.5.0, 11.4.1 HF2

Opened: Aug 26, 2013

Severity: 3-Major

Related Article: K15168


The following SNAT iRule intermittently selects self IP rather than configured IP: ltm rule r7 { when LB_SELECTED { log local0. [IP::local_addr] snat [IP::local_addr]:[UDP::local_port] } }


Self IP rather than configured IP is used in SNAT irule.


SNAT irule is used on MBLB proxy



Fix Information

Modified MBLB proxy to correctly detect irule running state.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips