Simple definition
IXFR is a concept or mechanism used in a network & dns to transfer only changes to an area DNS.
Technical definition
In a business environment, IXFR mainly intervenes to transfer only changes of a zone DNSIts implementation depends on the architecture, equipment and security policies in place.
What is it used for?
transfer only changes to an area DNS.
Practical example
a secondary update its area without re-doing a AXFR full.
Common issues
- missing newspaper
- Incoherent
- Fallback AXFR
Key takeaway: Always adapt the diagnosis to the product version and the architecture actually deployed.