[50401] in North American Network Operators' Group
Re: solving problems instead of beating heads on walls
daemon@ATHENA.MIT.EDU (Andy Dills)
Sat Jul 27 17:19:54 2002
Date: Sat, 27 Jul 2002 17:18:27 -0400 (EDT)
From: Andy Dills <andy@xecu.net>
To: Brad Knowles <brad.knowles@skynet.be>
Cc: Paul Schultz <pschultz@pschultz.com>, <nanog@merit.edu>
In-Reply-To: <a05111b0fb968b6c6bcbd@[10.0.1.60]>
Errors-To: owner-nanog-outgoing@merit.edu
On Sat, 27 Jul 2002, Brad Knowles wrote:
> > Responsible and overall best: connect to the same 2+ providers in both
> > locations and announce more specifics locally in each region/city/whatever
> > with no-export.
>
> As said above, this isn't possible. I'd like to learn what could
> be done in this kind of situation that would allow the desired
> redundancy, while also being responsible.
>
> I'm not a manager of a large network (where I might have this
> kind of problem myself), nor am I employed at a large ISP (where my
> customers might have this kind of problem). But I would like to
> learn.
It depends on the quality of intra-AS connectivity.
In situations such as Ralph's, where intra-AS connectivity is strong, it
has been shown that there is a technique to allow for the weaker transit
link to be only used for backup: conditional BGP announcements and a gre
tunnel over the transit links in both cities.
Andy
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