Re: [dns-wg] Re: rev delegation robot and selection of NS to pull zone from

[Ralf Weber denic@localhost]

Moin!

On 20.11.2008, at 20:14, Anand Buddhdev wrote:
> When the RIPE NCC's provisioning system sees ns.ripe.net in the list  
> of
> name servers for /16 IPv4 and /32 IPv6 zones, it looks up the SOA  
> record
> of the zone, extracts the MNAME from there, and looks up A and AAAA
> records for the MNAME. These are then used to attempt zone transfers  
> for
> that zone. The provisioning system does not use any servers from the  
> NS
> RRset.
Why? I mean for me that would be one natural source of information  
another of course would be the nserver entries in the RIPE database.  
Using these source also would increase the resiliency of the zone  
transfers as the server then usually has more than one source to  
transfer the zone from. I think that this is what people using hidden/ 
distribution masters want to have also, at least from my experience  
with our customers using this.
[..]
> One solution is to list a server in the MNAME field which will provide
> zone transfers. Alternatively, you can choose not to use ns.ripe.net  
> as
> a secondary - it is no longer mandatory for /16 IPv4 and /32 IPv6
> reverse zones.
Both are options, but I still would like to know if it wouldn't make  
more sense to use nserver records or NS RRset. Do you have some  
statistics on how often the MNAME is not in the nserver/NS RRset?
So long
-Ralf
---
Ralf Weber
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