Re: notes on A6 transition from AAAA (fwd)

[Olafur Gudmundsson <ogud@ogud.com>]

On Tue, 27 Mar 2001, Bill Sommerfeld wrote:

>>    >     A authoritative server that only has AAAA entries and
>>    >     is asked for an A6 record MUST NOT synthesize A6 records
>>    >     from the AAAA ones. There is no restriction on populating both
>>    >     types, but it is strongly recommended against, and in such a case,
>>    >     both RRsets MUST be identical.
>> 
>>    is this limited to zero-prefix A6, or does it include A6's with
>>    non-zero prefixes which just happen to resolve to the same thing?
>>    Based on Rob's "zero prefix A6 is equivalent to AAAA" slide, I assume
>>    the former..
>> 
>> No, our theory was that we really didn't want synthesized A6 RRs at
>> all, full stop.  
> 
> I was asking about the "populating both types as long as both RRsets
> are identical" approach -- you need to define what you mean by
> "identical".
> 

Identical == same number of records in both sets and 
	     for each AAAA record there exists A6/0 record with same
		address

An A6/n (where n> 0) pointing at an routing prefix does not count even if
A6 synthesis would generate an A6/0 identical to one of the AAAA. 

	Olafur




to unsubscribe send a message to namedroppers-request@ops.ietf.org with
the word 'unsubscribe' in a single line as the message text body.