[28036] in North American Network Operators' Group
Re: Policies: Routing a subset of another ISP's address block
daemon@ATHENA.MIT.EDU (Jesper Skriver)
Wed Apr 5 12:04:50 2000
Date: Wed, 5 Apr 2000 18:01:27 +0200
From: Jesper Skriver <jesper@skriver.dk>
To: "Daniel L. Golding" <dan@netrail.net>
Cc: David Harrison <david.harrison@interpath.net>, nanog@merit.edu
Message-ID: <20000405180127.C77495@skriver.dk>
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In-Reply-To: <Pine.BSI.4.05L.10004051042200.3110-100000@cartman.netrail.net>; from dan@netrail.net on Wed, Apr 05, 2000 at 10:45:07AM -0400
Errors-To: owner-nanog-outgoing@merit.edu
On Wed, Apr 05, 2000 at 10:45:07AM -0400, Daniel L. Golding wrote:
> On Wed, 5 Apr 2000, Jesper Skriver wrote:
>
> >
> > On Wed, Apr 05, 2000 at 08:33:25AM -0400, David Harrison wrote:
> > >
> > > We have a situation where we have a client who wants to be dual-homed
> > > for redundancy. They are not large enough to get addresses from ARIN.
> > > Given that they are wanting us to allow another provider to route a
> > > subset of one of our address blocks(5 /24's out of a /16).
> > > Looking for some recommendation/dangers and general policies in
> > > reference to this. Thanks for any input. If this is the incorrect list
> > > to post this on please let me know.
> >
> > Refuse to do it, the customer must get PI addresses for this purpose.
>
> That's simply not true. Many ISPs will advertise another's netblocks for a
> mutual downstream. The client doesn't have enough IP space to qualify for
> PI space in any case unless they utilize a /21 to 80% while being
> multihomed.
Bad luck ...
I can say for sure, that we doesn't accept more specific announcements within
our PA blocks, nor does we accept traffic with a source within these
blocks.
> I don't see the logic behind refusing the customer a request of this sort.
Exploding routing tables, and it makes it impossible to do anti-spoofing
filters ...
/Jesper
--
Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456
Work: Network manager @ AS3292 (Tele Danmark DataNetworks)
Private: Geek @ AS2109 (A much smaller network ;-)
One Unix to rule them all, One Resolver to find them,
One IP to bring them all and in the zone to bind them.
