Re: [dnsext] [Technical Errata Reported] RFC2782 (2984)

[Jordan Brown <[e-mail]>]

On 10/04/11 16:00, Masataka Ohta wrote:
> RFC Errata System wrote:
>
>> Corrected Text
>> --------------
>> Correcting the text requires agreement on what to do with entries with
>> weight=0, so I don't want to try to craft text until we have agreement there.
>
>  From examples of the RFC:
>
>        ; NO other services are supported
>        *._tcp          SRV  0 0 0 .
>        *._udp          SRV  0 0 0 .
>
> it is obvious that weight=0 means that the RR must not be
> selected.

Perhaps, but on the other hand it also says:

	Domain
         administrators SHOULD use Weight 0 when there isn't any server
         selection to do, to make the RR easier to read for humans (less
         noisy).  In the presence of records containing weights greater
         than 0, records with weight 0 should have a very small chance of
         being selected.

>
>> I suggest:
>>
>> - Ordering weight=0 entries to the end.
>> - Generating random numbers 0..(T-1).
>> - Using a "greater" test rather than "greater or equal".
>> - Selecting weight=0 entries in any order when all of the weight!=0 entries have been selected.
>
> I suggest:
>
>> - Generating random numbers 0..(T-1).
>> - Using a "greater" test rather than "greater or equal".
>
> 							Masataka Ohta