[ipv6hackers] Announcing a /6

[Job Snijders]

On Tue, Sep 01, 2015 at 05:41:15PM +1000, Geoff Huston wrote:
> 
> I see 2400::/6 in my IPv6 table, with an AS Path of 4608 1221 4637 32098
> 
> http://www.cidr-report.org/cgi-bin/as-report?as=AS32098&view=2.0&v=6

Given these two prefixes at the top of the report:

    Prefix               AS Path
    604:d600:602::/48    4608 1221 4637 32098
    2400::/6             4608 1221 4637 32098

I suspect the first prefix is there because they forgot to type the
leading '2' (604 probably should be 2604), the second prefix might be
because the trailing '4' was omitted when typing something like
2604:d600:xxx/64 on a router to router link.

> Anyone got any clues as to how this super aggregate has leaked out?

My guess would be the lack of proper filters at multiple borders.

Kind regards,

Job