Bug ID 643455: Update TTL for equally trusted records only

Last Modified: Dec 14, 2020

Bug Tracker

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,

Fixed In:

Opened: Feb 06, 2017
Severity: 4-Minor


A child server's domain name may continue to be resolved by the child server even after the parent server revokes the NS record for the child server.


A client will still use the revoked child server after it is revoked.


* Steady series of DNS queries for a domain name in the child server. * The TTL for the domain name. A record is shorter than the TTL for the NS record for the child name server. * The NS record is removed from the parent server.


Restart the TMM to clear out the cache.

Fix Information

The TTL is updated for equally trusted records only.

Behavior Change