[54056] in North American Network Operators' Group
Re: /8s and filtering
daemon@ATHENA.MIT.EDU (David Schwartz)
Tue Dec 10 06:00:16 2002
From: David Schwartz <davids@webmaster.com>
To: <hnarayan@cs.ucsd.edu>, <nanog@merit.edu>
Date: Tue, 10 Dec 2002 02:58:18 -0800
In-Reply-To: <Pine.GSO.4.32.0212100106250.17744-100000@gradlab.ucsd.edu>
Errors-To: owner-nanog-outgoing@merit.edu
>I was also curious about this - if I am a customer who wants to
>multihome and can justify only a /24, I would go to an ISP
>which has an allocation from the Class C space rather than one=
from the
>Class A space.
=09It doesn't matter. For all practical purposes, basement=
multihomers only
care that their two or three providers have their route.
> Do ISPs get to choose where the allocation comes from?
=09Ask your ISP if they'll let you choose. But it usually doesn't=
matter, if
you can only justify a /24, you'll find about the same filtering=
policies in
both traditional class A space and class C space.
=09But again, it doesn't matter. So long as each of your providers=
will honor
your route (and why wouldn't they, you're paying them to) you=
shouldn't have
a problem.
=09Just pick your most reliable provider, and the one you're pretty=
sure you're
going to stay with the longest, and get your IP space from them.=
Make sure
they don't mind you advertising your block through other=
providers.
=09And give some thought to hiring a competent consultant to help=
you. You can
hire a consultant even if you are the consultant. In fact, no=
competent
consultant would do otherwise outside his or her area of=
expertise. Don't
learn to multihome at your client's expense. ;)
=09DS
