Bug ID 1217077: Race condition processing network failover heartbeats with timeout of 1 second

Last Modified: Apr 26, 2024

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

Known Affected Versions:
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,,,, 17.1.0,,,, 17.1.1,,,

Opened: Jan 06, 2023

Severity: 4-Minor


Unexpected failover or log messages similar to the following: sod[1234]: 010c0083:4: No failover status messages received for 1.100 seconds, from device bigip02( (unicast: ->


A failover event could impact traffic flow.


- HA configuration network failover configured - DB variable 'failover.nettimeoutsec' set to a value of 1 second.


Following recommended practices of configuring network failover addresses using both the Management IP and Self IP addresses will reduce the chances of initiating a failover. Log messages may still be observed. Setting the DB variable 'failover.nettimeoutsec' to a value of 2 or greater should avoid the issue.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips