Re: Teredo server selection

[Nathan Ward <v6ops@daork.net>]

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On 23/12/2007, at 11:28 AM, Florian Weimer wrote:
> * Nathan Ward:
>
>> 1) Lookup A record for `_teredo._udp.arpa.' (or whatever. Note the
>> trailing . - we don't want to be looking up
>> `_teredo._udp.arpa.defaultdomain' etc.)
>
> You should really discuss this with DNS people.  This is a very bad  
> idea
> because it produces lots of pointless queries which need to be handled
> somewhere, probably on a production name server.


You are talking about the use of .arpa, I assume, and query load on  
the root servers?

I think I understand the concern, but negative caching would deal with  
this, same as it does for .local., .invalid., etc. The negative TTL on  
both .arpa and . is 86400s.

We're only talking about 1 query each time the Teredo client boots, so  
load on ISPs' recursive nameservers is not large - my laptop does  
several queries per minute when idle, let alone at boot time or when  
it's actively doing something.

- --
Nathan Ward





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