[11267] in North American Network Operators' Group
Re: Non-ISP companies multi-homing?
daemon@ATHENA.MIT.EDU (Gordon Mercer)
Thu Jul 24 12:07:49 1997
In-Reply-To: <v03007810affd1c55264a@[38.11.2.110]>
From: Gordon Mercer <gmercer@dn.net>
Date: Thu, 24 Jul 97 11:40:29 -0400
To: nanog@merit.edu
>
> >Supposing to have IBGP to one ISP (to avoid assigning of
> >independent AS) and EBGP to the second ISP, again will
> >my router announce the /24 inside of the first ISP
> >address block to the EBGP peer ??
>
> Interesting approach. In general, the ISPs I know would
> be reluctant to run iBGP with a customer, unless they had
> total control of all BGP speakers. If I understand you
> correctly, the enterprise would have to tag its
> advertisements to the second ISP with the ASN of the
> first, since the enterprise doesn't have its own. Again,
> I think most ISPs would be reluctant to give up this
> amount of control.
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.
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