Bug ID 1287045: In-TMM monitor may mark pool member offline despite its response matches Receive Disable String

Last Modified: May 08, 2024

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

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,, 15.1.9,, 15.1.10,,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,,,, 16.1.4,,,, 17.0.0,,, 17.1.0,,,, 17.1.1,,,

Opened: Apr 11, 2023

Severity: 3-Major


Despite response matching monitor's Receive Disable String, pool member may by marked offline by the in-TMM monitor while the BIGD monitor would mark it as available/disabled. It is particularly likely if the matched pattern is located in the front of the pool member's response data.


Pool member is marked offline while it should be marked available/disabled by the in-TMM monitor.


-- HTTP, HTTP2, or TCP monitor is used. -- In-TMM monitor is enabled. -- Both Receive String and Receive Disable String are provided.


Use BIGD instead of in-TMM monitor.

Fix Information


Behavior Change

Guides & references

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