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

Last Modified: Apr 05, 2021

Bug Tracker

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

Known Affected Versions:
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

Opened: May 31, 2019
Severity: 3-Major

Symptoms

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.

Impact

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

Conditions

-- 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

Workaround

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

Fix Information

None

Behavior Change