[28730] in North American Network Operators' Group
Re: Multi-home II
daemon@ATHENA.MIT.EDU (Daniel L. Golding)
Sun May 14 14:57:30 2000
Date: Sun, 14 May 2000 14:54:24 -0400 (EDT)
From: "Daniel L. Golding" <dan@netrail.net>
To: Alex Bligh <amb@gxn.net>
Cc: Rural CNE <bwalters@inet-direct.com>, nanog@nanog.org
In-Reply-To: <E12r1a9-0007Gm-00@sapphire.noc.gxn.net>
Message-ID: <Pine.BSI.4.05L.10005141453050.12862-100000@cartman.netrail.net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Errors-To: owner-nanog-outgoing@merit.edu
On Sun, 14 May 2000, Alex Bligh wrote:
>
> > > Can you please help point out a good may to multi-home?
> > > I would like to get a site put in a Co-lo in the west coast
> > > and one in the east coast. Both would be different co-lo's.
> > > Could I get a single ASN and handle both places with different
> > > subnets under the same ASN?
>
> Yes but it's kludgy as your West coast router's BGP loop
> detection algorithm will cause it to ignore the routes
> to your East coast colo that are heard from your West coast
> upstream. You can fix this, for instance, by defaulting
> to a network originated by your upstream.
> I am assuming you send different subnets to your
> upstream(s) at either site; if both subnets together form
> a supernet and you use the same upstream, you can also send
> that same supernet from both East and West coasts and mark
> the subnets no-export which should (a) save on prefixes and
> (b) mean your advertized route is larger and less likely
> to get filtered / damped.
An aggregate address announcement by your upstream would also do this
quite nicely...
[snip]
>
> --
> Alex Bligh
> VP Core Network, Concentric Network Corporation
> (formerly GX Networks, Xara Networks)
>
>
>
