Last Modified: Apr 10, 2019
See more info
Known Affected Versions:
12.0.0, 12.0.0, 11.6.1
Opened: Aug 31, 2016
Related AskF5 Article: K48693281
A UDP monitor might fail to mark a pool member up even when the pool member is up. Other monitor types may mark a pool member down. A slight delay (less than 0.1 seconds) might be noticed in monitor traffic sent by the BIG-IP.
Incorrect pool member status or pool member flapping. Connections to monitored pool members might last slightly longer than necessary.
To experience the incorrect pool member status issue, there is generally some other monitor on the system that is legitimately down. To experience the delay, run an affected version. The issue has been observed with TCP, HTTP, and HTTPS monitors.
In this release, the system now correctly sets pool member status and connections to monitored pool members no longer last longer than necessary.