RFC1996 and IXFR dependency graph loops

[Kevin Darcy]

Ketil Froyn wrote:

> Hello.
>
> Section 2.2 of RFC1996 states:
>
>    2.2. The zone's servers must be organized into a dependency graph
>    such that there is a primary master, and all other servers must use
>    AXFR or IXFR either from the primary master or from some slave which
>    is also a master.  No loops are permitted in the AXFR dependency
>    graph.
>
> I read this to mean that loops in IXFR dependency graphs are legal, but
> loops in AXFR dependency graphs are not. Does anyone know the reason AXFR
> loops are not allowed, and then the reason why IXFR loops are ok?

I suspect you're reading too much into the RFC verbiage, but if you really
want a definitive clarification, you should probably try the namedroppers
mailing list (see http://www.ietf.org/html.charters/dnsext-charter.html for
further information).


- Kevin