IPv4 and IPv6 hijacking by AS 6

Fri Apr 13 16:38:31 UTC 2018

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...

    Bjørn