[28035] in North American Network Operators' Group
Re: Policies: Routing a subset of another ISP's address block
daemon@ATHENA.MIT.EDU (Brandon Ross)
Wed Apr 5 11:44:20 2000
Date: Wed, 5 Apr 2000 11:41:31 -0400 (EDT)
From: Brandon Ross <bross@netrail.net>
To: nanog@merit.edu
In-Reply-To: <38EB3295.A664A1A@interpath.net>
Message-ID: <Pine.LNX.3.96.1000405113815.3725Y-100000@ogre.sheratonsuites.com>
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On Wed, 5 Apr 2000, 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).
An important point that both you and your customer should keep in mind is
that if one provider will be announcing this as a /16 and the other as
smaller blocks, much of the traffic will follow the more specific routes
creating a rather large imbalance of incoming (toward the customer)
traffic between the 2 connections.
Of course, there will be many people's networks that won't listen to the
announcements unless this is swamp space.
Brandon Ross 404-522-5400
VP Engineering, NetRail http://www.netrail.net
AIM: BrandonNR ICQ: 2269442
Read RFC 2644!
Stop Smurf attacks! Configure your router interfaces to block directed
broadcasts. See http://www.quadrunner.com/~chuegen/smurf.cgi for details.
