Return two locations or low TTL [was: DNS caches that support partitioning ?]

Shumon Huque shuque at upenn.edu
Mon Aug 20 09:26:55 CDT 2012


On 8/20/12 10:11 AM, Tony Finch wrote:
> Patrick W. Gilmore <patrick at ianai.net> wrote:
>> On Aug 20, 2012, at 08:47 , Chris Adams <cmadams at hiwaay.net> wrote:
>>>
>>> Most anything that supports IPv6 should handle this correctly, since
>>> getaddrinfo() will return a list of addresses to try.
>>
>> Ah, the amazing new call which destroys any possibility of randomness or
>> round robin or other ways of load balancing between A / AAAA records.
>> Yes, all of us returning more than one A / AAAA record are hoping that
>> gets widely deployed instantly.  Or not.
>
> The problem is RFC 3484 address selection; getaddrinfo is just the usual
> place this is implemented. I had believed that there was work in progress
> to fix this problem with the specs but it seems to have stalled.
> http://tools.ietf.org/html/draft-ietf-6man-rfc3484-revise-05
>
> Tony.
>

It's in the RFC editor queue actually:

http://datatracker.ietf.org/doc/draft-ietf-6man-rfc3484bis/?include_text=1
http://datatracker.ietf.org/doc/draft-ietf-6man-rfc3484bis/history/

--Shumon.




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