Last Modified: May 29, 2024
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 13.1.5, 13.1.5.1, 14.0.0.5, 14.0.1, 14.0.1.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1
Fixed In:
17.1.0, 17.0.0.1, 16.1.3.1, 15.1.7
Opened: Sep 27, 2019 Severity: 3-Major
Pool members are incorrectly marked DOWN by a monitor. The pool members send the expected response to the probe, but the BIG-IP system marks them DOWN.
Objects that are meant to be marked UP are marked DOWN. As a result, no load balancing occurs to affected resources.
This issue occurs when all of the following conditions are met: - In-TMM monitoring is enabled on the system (the 'bigd.tmm' db key is set to 'enable'; note this is set to 'disable' by default). - One or more TCP or HTTP monitors specify a receive string using HEX encoding, in order to match binary data in the server's response. - Depending on the HEX values specified (currently values in the range of 0x80-0xBF are believed to be affected), response matching fails.
Either one of the following workarounds can be used: - Disable in-TMM monitoring by setting 'bigd.tmm' to 'disable'. - Do not monitor the application through a binary response (if the application allows it).
The monitor finds the recv string and shows the pool or member as available.