[AusNOG] another ipv6 Q

[Gaurab Raj Upadhaya]

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On 7/3/14, 7:36 AM, Mark Newton wrote:
> 
> On Jul 3, 2014, at 2:30 PM, Jeroen Massar <jeroen at massar.ch>
> wrote:
> 
>> That is a single /32, out of the PA block of APNIC. Hence,
>> unless you convince every single ISP in the world to accept it,
>> the only thing you can announce is that /32, nothing else. More
>> specifics will properly be dropped.
> 
> Nope, complete bullshit.  I’m yet to find an ISP who isn’t 
> comfortable with any announcement down to /56.  My /48 subnet is 
> working just fine, thank you very much.

mark,

I would have agreed with you 100% few years ago, but it may be more
like 95% as v6 takes off and people apply sanitary policies to their
edges.

I actually leaked a /64, /56, /48 etc. for a while to look what i
could get through. In most cases, it'll work, but there are plenty of
networks it'll fail from, specially coming from Europe.

It will always remain shaky on who will filter on what, but I think
it's safe to assume that there'd be enough networks that'll filter on
RIR boundaries and if you care, you'd make sure you have a covering
prefix announced.

FWIW, The biggest carrier from where Jeroen comes from still does
strict RIR boundary filters, so he probably has an stronger opinion.

- -gaurab

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