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More PPPoE info

I thought this was an interesting bit of info regarding
PPP over Ethernet, used by telcos like Bell Atlantic:


> PPPoE is a solution for Outsourcing. Telcos are required to open their
> networks to other ISPs. With dhcp, it's impossible.
> The PPPoE solution creates a PPP link over ethernet, up to the BAS
> (Bandwidth Access Server), it uses the Radius protocol to communicate with
> the ISP to authenticate the user and password. It then assigns an IP
> address from the ISP, and creates a ATM tunnel between the BAS and the ISP
> POP.
> So the user has the IP address of his ISP, and the telco can bill per
> user, and give accounting to the ISP (total time connected, total
> download/upload).
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