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IPv4 and IPv6 hijacking by AS 6

Unfortunately, that's how it's done in route policy on XR, so people bouncing between flavors can easily make that mistake.

On 4/13/18, 4:15 AM, "NANOG on behalf of Bjørn Mork" <nanog-bounces at nanog.org on behalf of bjorn at mork.no> wrote:

    Anurag Bhatia <me at anuragbhatia.com> writes:
    > Similar for AS2.
    I believe we've seen bogus low AS number announcements a few times
    before, and they've usually been caused by attemts to configure
    AS path prepending without understanding and/or reading the docs.
    Someone might have wrongly assumed that
       set as-path prepend 133711 133711
    could be written shorter like
       set as-path prepend 133711 2
    and there you go...