A, CNAME or both issue on draft-palet-v6ops-solution-tun-auto-disc-01.txt

[JORDI PALET MARTINEZ <jordi.palet@consulintel.es>]

Hi all,

Last one ;-)

Please, once more, read the document and provide your inputs, specially on
this:


>>>> the client (rather the operating system)
>>>>  makes a DNS query [6][7] for QNAME=teredo_srv.ispname.com, QCLASS=IN,
>>>>  and QTYPE=A or QTYPE=CNAME.
>>>> 
>>>> ==> which QTYPE is it?  Are you saying the implementations need to query
>>>> both?  That's not good.  Note that if you do a QTYPE=A query, that should
>>>> also match CNAME and give the A record in the answer section, so there is
>>>> no
>>>> need to query CNAME explicitly.  Try e.g. 'dig aaaa ftp.ipv6.funet.fi'.
>>> 
>>> No, just query one of both, the one the OS prefers ;-)
>> 
>> Uhh, you need to specify better what to do so that it can be done in
>> an interoperable manner.  Or if you specify you have to query both,
>> that's OK too, but causes significant issues because it takes
>> additional packets and additional latency.
> 
> Yes, you're right. I guess it will be simple to stick to A, if we care so
> much about the extra packets. WG opinion ?


Regards,
Jordi




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