[168205] in North American Network Operators' Group
Re: best practice for advertising peering fabric routes
daemon@ATHENA.MIT.EDU (Joe Abley)
Wed Jan 15 12:36:15 2014
From: Joe Abley <jabley@hopcount.ca>
In-Reply-To: <52D6BF92.7070400@shankland.org>
Date: Wed, 15 Jan 2014 12:35:51 -0500
To: Jim Shankland <nanog@shankland.org>
Cc: "nanog@nanog.org Operators' Group" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On 2014-01-15, at 12:04, Jim Shankland <nanog@shankland.org> wrote:
> On 1/14/14, 8:41 PM, Patrick W. Gilmore wrote:
>> I repeat: NEVER EVER EVER put an IX prefix into BGP, IGP, or even =
static route. An IXP LAN should not be reachable from any device except =
those directly attached to that LAN. Period.
>=20
> So ... RFC1918 addresses for the IXP fabric, then?
I've heard apparently non-drunk people suggest IPv6 link-local addresses =
as BGP endpoints across exchanges, too.
> (Half kidding, but still ....)
RFC 6752.
One observation on this thread: some networks have customers who react =
badly to unusual things seen in traceroute. Sometimes the margin on an =
individual customer is low enough that one support call displaces any =
profit you were going to make off them this month.
It's understandable to me that such network operators would choose to =
carry IXP routes internally in order to avoid that potential support =
burden.
I don't pretend to have any universal good/bad answer to the original =
question, though. I don't think the world is that simple.
Joe
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