[nsp] Methods for Non-BGP multihoming

Manolo Hernandez manolo@dialtoneinternet.com
26 Jul 2002 11:16:18 -0400


Joe is right that is a big no no. The same prefix can not originate from
two different ASs as that would cause routing loop etc. So a public AS
and registration for RADB is just about mandatory for a multi-homed ISP.

On Fri, 2002-07-26 at 10:43, Joe Provo wrote:
> On Fri, Jul 26, 2002 at 08:48:42AM +0300, Pekka Savola wrote:
> > On Thu, 25 Jul 2002, Elliott, Andrew wrote:
> > > >The best solution considering the requirements is to run BGP with private 
> > > >AS numbers to your ISP's and have them remove them in the advertisements.  
> > > >That way you can have control on outbound/inbound traffic but don't need 
> > > >an ASN.
> > > 
> > > If you are multihomed, most ISPs will not allow you to use a private AS, as
> > > that will result in inconsistent originations for the prefix.
> > > 
> > > If you are going to use BGP in a multihomed situation, you will want to have
> > > your own AS.
> > 
> > AFAIK it's perfectly acceptable to have a prefix with multiple origins.
>  
> No.
> 
> --
> Joe Provo                                            Voice  508.486.7471
> Director, Internet Planning & Design                 Fax    508.229.2375
> Network Deployment & Management, RCN                 <joe.provo@rcn.com>
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