Bug ID 705768: dynconfd may core and restart with multiple DNS name servers configured

Last Modified: Jun 25, 2020

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,,, 14.1.2,,,,,,, 15.0.0, 15.0.1,,,, 15.1.0,,,

Opened: Feb 07, 2018
Severity: 2-Critical


The dynconfd daemon may crash with a core and restart when processing a DNS query while multiple DNS name servers are configured or the list of DNS name servers is changed.


Resolution of FQDN names for FQDN nodes and pool members may be briefly interrupted while the dynconfd daemon restarts. This may cause a delay in propagation of DNS zone changes to the BIG-IP configuration.


This may occur rarely when FQDN nodes are configured and multiple DNS name servers are configured, including when a name server is added to or removed from the system DNS configuration while a DNS query is active.


This issue occurs rarely. There is currently no known workaround.

Fix Information


Behavior Change