Bug ID 643455: Update TTL for equally trusted records only

Last Modified: Sep 13, 2023

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

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

Fixed In:
14.0.0,, 12.1.6,

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

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips