[81136] in North American Network Operators' Group
Re: soBGP deployment
daemon@ATHENA.MIT.EDU (Bill Woodcock)
Thu May 26 11:14:12 2005
Date: Thu, 26 May 2005 08:10:35 -0700 (PDT)
From: Bill Woodcock <woody@pch.net>
To: Todd Underwood <todd@renesys.com>
Cc: nanog@nanog.org
In-Reply-To: <20050526102226.GD7450@renesys.com>
Errors-To: owner-nanog@merit.edu
On Thu, 26 May 2005, Todd Underwood wrote:
> the scalability problem, as i understand it (not at all an expert
> here) is that routers won't currently handle such a list with regexps
> very well. apparently, ciscos will not allow filtering advertisements
> on a combination of prefix + as-path regexp at all and junipers will,
> but the perception is that they will not scale to a list of 300-500K
> (which is the union of routes in global tables without any
> consolidation). if you could consolidate all equally originated
> prefixes under their covering supernets and still adequately filter,
> that number would be *much* smaller, obviously.
Or if you could do it based on atoms rather than prefixes. But atoms have
been looking like a trickier concept than I first thought, as we've
started to look at them.
-Bill
