[144662] in North American Network Operators' Group
Re: The Cidr Report - 4byte ASN handling
daemon@ATHENA.MIT.EDU (Mark Tinka)
Fri Sep 16 14:20:05 2011
From: Mark Tinka <mtinka@globaltransit.net>
To: nanog@nanog.org
Date: Sat, 17 Sep 2011 02:11:24 +0800
In-Reply-To: <B9EBD2474913AD4A995B8C7B8BEF8C0E14F661AFED@FHDP1LUMXC7V43.us.one.verizon.com>
Cc: "cidr-report@potaroo.net" <cidr-report@potaroo.net>
Reply-To: mtinka@globaltransit.net
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Friday, September 16, 2011 07:51:04 AM Schiller, Heather=20
A wrote:
> I thought AS-plain notation was the standard for 4-byte
> ASN's?
as-plain is not the "standard" per se. Think of it more as=20
the "preferred" option within the industry.
o All major vendors support it, so there's no need
to convert to as-dot when you upgrade your router
software to support 4-byte ASN's.
o as-plain doesn't break your AS_PATH regular
expressions, which is very useful.
o as-plain is a known representation format among
operators, and 4-byte ASN's continuing this
tradition keeps the network stable.
as-dot notation looks really Cool & Sexy (tm), but is=20
cumbersome for your AS_PATH regular expressions. It doesn't=20
make things impossible, just, well, cumbersome :-).
Hope this helps.
Cheers,
Mark.=09
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