[66719] in North American Network Operators' Group
Re: Outbound Route Optimization
daemon@ATHENA.MIT.EDU (vijay gill)
Wed Jan 21 16:21:03 2004
Date: Wed, 21 Jan 2004 21:20:16 +0000
From: vijay gill <vgill@vijaygill.com>
To: Paul Vixie <vixie@vix.com>
Cc: nanog@merit.edu
In-Reply-To: <g3k73lqafp.fsf@sa.vix.com>
Errors-To: owner-nanog-outgoing@merit.edu
On Wed, Jan 21, 2004 at 09:05:46PM +0000, Paul Vixie wrote:
>
> > My questions are these:
> >
> > "Is sub-optimal routing caused by BGP so pervasive it needs to be
> > addressed?"
>
> that depends on your isp, and whether their routing policies (openness
> or closedness of peering, shortest vs. longest exit, respect for MEDs)
> are a good match for their technology/tools, skills/experience, and
> resources/headroom.
In practice, all of the above just turn out to be marketing sauce
or in some cases, outright lies.
There is no substitute for dollar spend (opex and capex) to make
a network perform. There is no magic sauce, there is no silver
bullet. You have adequate resources, you will have adequate
performance.
> metrics, which is usually not very good. but there's another limit, which
> is bgp path symmetry. most tcp implementations are still stone-aged
AKA optimizing for outbound doesn't do you any good on optimizing
for inbound.
> (experience says they're not going to trust your MEDs even if they're close
> enough to hear them.)
Most people don't trust MEDs for a reason paul, and it is not because
they want to mess with your customers.
/vijay
