nanog mailing list archives

Re: MikroTik strikes again ?


From: Bret Clark <bclark () spectraaccess com>
Date: Mon, 03 May 2010 06:44:53 -0400

Tim Warnock wrote:
Adrian M wrote:
MikroTik strikes again ?

%BGP-6-ASPATH: Long AS path ... 39412 39625 39625 39625 39625 39625
39625 39625 39625 39625 39625 39625 39625 39625 39625 39625 39625
From: Bret Clark [mailto:bclark () spectraaccess com]
Sent: Monday, 3 May 2010 8:26 PM
To: nanog () nanog org
Subject: Re: MikroTik strikes again ?

Uhm....okay...but why does anyone prepend their ASN that much? Are you
saying the Mikrotik did that on purpose?


MikroTik asks for an amount of prepends rather than what ASN to prepend
with.

There was a bug in an old version that would modulus the ASN with 256 and
prepend that many times.

In this case 39625 modulo 256 = 201 prepends.

Yeah...guess I see why that would be a problem.


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