Bug ID 788625: A pool member is not marked up by the inband monitor even after successful connection to the pool member

Last Modified: Jan 04, 2022

Bug Tracker

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

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 16.0.0,, 16.0.1,

Fixed In:
16.1.0,, 15.1.4,

Opened: May 31, 2019
Severity: 3-Major


1. Pool member is still shown as down even after BIG-IP has connected to it. 2. If a pool has only one pool member, continuous logs are seen in /var/log/ltm, at the frequency of auto-init interval and in-band timer interval mentioning about pool member being in-active and active respectively.


Pool member marked down, even though the pool member is up


-- Auto-init is enabled to continuously try connecting the pool member -- An inband monitor is configured -- The inband monitor's retry interval is slightly less than auto-init interval


Configure the inband monitor's retry interval to be the lowest interval possible, which is 1 second.

Fix Information

Pool member should be marked as up by the inband monitor, when the pool member comes up and connection to it is successful.

Behavior Change