mailing list archives
Re: Non-ISP companies multi-homing?
From: Gordon Mercer <gmercer () dn net>
Date: Thu, 24 Jul 97 12:34:31 -0400
Without the ISP having total control over the customer
router, a misconfiguration of filters on the customer
side could easily cause the customer to be a valid (and
1 hop) path in the tables from ISP A to ISP B. Doesn't
sound like a possibility I would be willing to have
hanging over my head.
Well, since my bandwidth is necessary for my business, I
think I'd be much more concerned about becomming the
valid route than my upstreams, if they get better routing
through me, it's not necessarily a bad thing for them
unless they're concerned about me snarfing traffic.
They've also got to worry about your bandwidth, which
could become a big issue depending on the size of the two
Plus, you can filter out what you send to me if you're my
upstream. That means you'll need a misconfigured router
on your side *and* one on mine. I don't know your
competency, but I'm fairly certain of mine ;). I put a
lot more time, effort and care into choosing a provider
than you do into choosing a customer.
In the particular scenario being discussed, which routes
would you want from your upstream? You might want full
routes for the ability to actually choose best path, and
then the upstream providers loose control over what you
are sending where.
A and B can both filter what the customer sends to them
based on network, and then the problem is solved.
Unfortunately, this does not always give customers the
flexibility they are looking for.
I'm sure you know exactly what you are doing, but not
every Joe that a provider takes on does. My point is only
that this is a situation that I would not want to bring
Gordon Mercer -=<Dedicated>=-
703 642 2800 -=<Servers>=- gmercer () dn net