Bug ID 617286: Frequent DNS Express zone transfers can prevent updated zone data becoming available.

Last Modified: Jan 29, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP DNS(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, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4

Fixed In:
14.0.0

Opened: Sep 16, 2016
Severity: 3-Major
Related AskF5 Article:
K14649433

Symptoms

If DNS Express performs a zone transfer more frequently than every 15 seconds, the new data will not become available until there is a 15 second period with no zone transfers.

Impact

Updated data in zone transfers is not available.

Conditions

DNS Express performs a zone transfer more frequently than every 15 seconds.

Workaround

If possible, configure environment such that there is a 15 second window between zone updates. or If possible, disable notifies from the master dns server and lower the refresh time of the SOA record, forcing dnsX to check serial numbers of the zone at refresh interval and refresh the zone if needed.

Fix Information

DNS Express no longer has the 15 second delay, so updated data in zone transfers is immediately available.

Behavior Change