Portable IP space, isolated networks, BGP, etc... (fwd)

Thu Dec 9 21:07:30 UTC 1999

I'm forwarding this off inet-access because there is a lot more BGP clue
here.  Anyone have any comments on the particular situation below, and/or
regarding announcing different routes at multiple locations to multiple
providers with single/many different ASNs?

Thanks,

-- Tim

--------------------------------------------------
* Timothy M. Wolfe, Chief Network Engineer       *
* ClipperNet Corporation / It's a wireless world *
* tim at clipper.net 800.338.2629 x 402	         *
* Sufficient for today = Inadequate for tomorrow *
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---------- Forwarded message ----------
Date: Thu, 9 Dec 1999 12:58:46 -0800 (PST)
From: Tim Wolfe <tim at clipper.net>
Reply-To: list at inet-access.net
To: list at inet-access.net
Subject: Re: Portable IP space, isolated networks, BGP, etc...

On Thu, 9 Dec 1999, James Fischer wrote:

> From: "Troy Settle" <st at i-plus.net>
> Subject: Portable IP space, isolated networks, BGP, etc...
> 
> > I've been thrown into a situation where I've got 8 isolated networks
> > connected to a variety of providers.  Eventually, most of these will be
> > connected with our own backbone.  I need to find a way to make the
> > transition as seemless as possible.
> >
> > First, it's my understanding that I can use a single ASN for the BGP
> peering
> > at each of these networks.  Am I mistaken?
> 
> Yes, this is a Big Mistake(tm).  One would need a unique ASN for each site,
> but they are only numbers, and the cost is like $500 each.  Think about
> the implications of two different sites, fed by the same provider, both
> using the same ASN.   Not a pretty picture.  BGP hell.

Could you please clarify what exactly the problem with doing this is?  Many
huge providers have multiple peering points that exchange routes using the
same ASN for their peering routers don't they?

-- Tim

--------------------------------------------------
* Timothy M. Wolfe, Chief Network Engineer       *
* ClipperNet Corporation / It's a wireless world *
* tim at clipper.net 800.338.2629 x 402	         *
* Sufficient for today = Inadequate for tomorrow *
--------------------------------------------------

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