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RE: multi-homing without the BGP (was RE: Packet Loss)

  • From: Anne Marcel Roorda
  • Date: Fri Dec 15 16:12:40 2000


  You may be able to get two or more providers to agree to do this for you
now, but this will get more difficult in the future.

  Special deals like you describe below will get tiresome very fast when 
you need to maintain them.

  Let's just say that there are some real scaling issue's with it, and
leave it at that.

- marcel
On Fri, 15 Dec 2000, Daniel Golding wrote:

> Jade,
> You don't really need a /20 to multihome or use BGP. Just get an ASN,
> multiple providers, and advertise your space. There are a couple ways to
> deal with those who will filter smaller blocks. One way is to get two
> providers, get space from one or both with a block larger than a /21. Ensure
> that the two providers peer directly with each other, and that they will
> advertise blocks smaller than a /20 to each other (/24 is a more normal
> filtering level these days). Also ensure that whichever of the upstreams
> that is giving you the space advertises it as the larger, less specific,
> aggregate as well. Given this situation, you should be fine. If your
> connection to the ISP announcing the globally routable aggregate goes down,
> it will still announce the aggregate, then route your traffic to the more
> specific route in the block being announced by it's peer. Works like a
> charm.
> - Dan Golding
> NetRail, Inc.
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On Behalf Of
> Jade E. Deane
> Sent: Friday, December 15, 2000 1:23 PM
> To: '[email protected]'
> Subject: multi-homing without the BGP (was RE: Packet Loss)
> I will spare everyone my own personal experiences as of late in dealing with
> ARIN for a /20.  How about some talk on this topic, multi-homing without the
> application of the BGP, a pressing concern amongst mid-level ISPs and small
> dot com's.
> Jade
> P.S.  Mr. Jimmerson... I want a /20, and a pony.  Give me a /20 and a pony,
> I want a pony!!!!
> Jade E. Deane
> Network Engineer
> Las Vegas, Nevada
> Office: +1 (702) 938-9267
> Cell: +1 (702) 604-4759
> Fax: +1 (702) 456-1471
> email: [email protected]
> urgent epage: [email protected]