[109456] in North American Network Operators' Group

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Re: How do dialup ISPs allow multiple clients under one access number?

daemon@ATHENA.MIT.EDU (Justin M. Streiner)
Mon Nov 24 10:49:09 2008

Date: Mon, 24 Nov 2008 10:52:17 -0500 (EST)
From: "Justin M. Streiner" <streiner@cluebyfour.org>
To: John Musbach <johnmusbach1@gmail.com>
In-Reply-To: <17c8e29e0811232314x144f0103m493d452b59d1c348@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org

On Mon, 24 Nov 2008, John Musbach wrote:

> I'm interested in figuring out how dialup ISPs work and have found
> plenty of info on dialin server setup but not much on how ISPs allow
> multiple clients under one access number, how do they do it?

That depends on what you mean by multiple clients.  If you mean multiple 
customers of a single ISP, you would provision serveral PRIs through a 
telco, and assign a phone number that will hunt down through all of PRIs 
to find an open port.

If you mean multiple clients in the sense that you're a dial wholesaler 
and you're providing service to multiple ISPs, you'd still do hunt groups 
as mentioned by other posters, plus you could also assign each wholesale 
client a unique RADIUS domain to allow for client-specific attributes to 
be applied to dialin sessions.  For example, this could be used to control 
the IP addresses that are assigned a given ISP's customers.

jms


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