Andrew White on Tue, 10 Oct 2000 08:28:46 -0400 (EDT)


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Re: PPPoE (was RE: [PLUG] DSL, Bell Atlantic, and Me)


On Mon, 9 Oct 2000, Leonard Rosenthol wrote:

> At 6:47 PM -0400 10/9/00, Andrew White wrote:
> >For the record, DCANet does not use PPPoE.  PPPoE and DHCP are
> >the two popular methods of assigning dynamic IP addresses to
> >residential DSL customers.
> 
> 	The two are mutually exclusive, Andrew!   DHCP is indeed a 
> method for assigning dynamic IP's, but PPPoE is just what the name 
> implies - it's a LINE protocol for controlling usage.

Hi Leonard,

Right -- they are two separate methods.
 
> 
> >PPPoE has a much larger following than does DHCP because it scales better.
> 
> 	PPPoE has a larger following for the simple reason that it 
> allows ISP's to control (and more importantly TRACK) actual line 
> usage.  PPPoE means that the ISP can dynamically drop your connection 
> (usually when it's idle) and then you need to "redial" when you want 
> to connect again.   And because they can track your connect time, 
> they can (potentially!!) bill you per minute!

PPPoE is evil, indeed.  However, it does have the benefit of allowing ISPs
to conserve IP address space.  ARIN (www.arin.net) puts significant
pressure on ISPs to conserve address space.

-Andrew



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