[address-policy-wg] Policy Change Request - Allow address allocations for anycast DNS operation

Joao,

> I would suggest a slight re-phrase:

> "Operators providing DNS for a zone served by a number of name servers
> such that the total response size when including the list of
> nameservers for the zone is close to the UDP packet
> size limit may be assigned PI network prefixes for the purpose of
> anycasting name servers, as described on RFC 3258. These shall be: a
> /24 IPv4 prefix and/or a /32 IPv6 prefix."

> Given that the issue is the will to anycast due to the  operational
> impact of adding more servers to the list, not just the size of the NS
> RRSET itself.

I see your point and it's the same thing I had in mind when I wrote the
policy down. I don't think that it makes sense to work to hard on an exact
definition when someone classifies for an allocation. As well it is 
impractical to say you have to cross the limits first (and prove that
your clients are suffering from it) before you can get your allocation.

I thought that those who are attracted by the policy will have no problem
justifying it and RIPE would have no problem to ask people returning the
networks if they do not use them as stated in the policy. But maybe
my thinking is too positive here.

Maybe the RIPE hostmasters can tell if they have the feeling the policy
is "clear" enough or if they would like to see real hard limits (i.e.
0,5% of all responses during a time window of 60 minutes must be 
truncated).

So far I think the original would serve RIPE and the DNS operators needs:

"Operators providing DNS for a zone that is approaching the UDP packet
size limit due to the number of authoritative servers may be assigned
PI network prefixes: a /24 IPv4 prefix and/or a /32 IPv6 prefix. These
prefixes will allow them to anycast the DNS server, as described in RFC
3258."

> Also, pardon me asking but would the request be for a /24 per server to
> be anycasted of a /24 per zone administrator?

One /24 per zone operator. I remember that someone (was that you?) would 
like to have /24 for putting the administrative interface of the anycast 
instances into another AS but as far as I recall there have not been much
support for that idea.

Have a nice day
Andreas
> Joao