[ale] Screwed by PPP0E

[Raylynn Knight]

On Thu, 2005-06-02 at 09:34 -0400, Michael H. Warfield wrote:
> On Thu, 2005-06-02 at 02:23 -0400, Raylynn Knight wrote:
> > On Wed, 2005-06-01 at 07:12 -0400, Geoffrey wrote:
> > > Raylynn Knight wrote:
> > <SNIP>
> > > > 
> > > > I'm with speedfactory and I don't have PPPOE.  Perhaps its because I pay
> > > > for extra static IP addresses.
> > > 
> > > This is likely true.  Care to share what you're paying and what your 
> > > speed is?
> > > 
> > I have the SpeedHome Platinum DSL (3M x 384K) + 5 Residential Static
> > IP's for 69.95 per month.
> 
> 	Are you SURE you don't have PPPOE?  I was under the impression, from
> them, that PPPOE has always been required for that setup from Speed
> Factory.  
> 
> 	That particular configuration is normally PPPOE but the PPPOE link may
> be (probably is) managed by your dsl modem.  It plays PPPOE with SF and
> provides you with a /29 and acts as a router between the two, which is
> why the "5" addresses.  A /29 has 8 addresses and you loose one to the
> "all zeros" network address, one to the "all ones" broadcast address and
> one to the router address itself, hence 5 "usable" addresses.  I
> remember one person telling me (I think it was at an AUUG meeting) of
> switching a modem in that configuration into passthrough mode and using
> all the addresses.  You could hook up something like a LinkSys WRT
> wireless router to something like that and have the static addresses out
> on your wireless.
> 
My five addresses are from a /29 so you are most likely correct.  I
don't have to deal with the PPPOE nonsense, so assumed I didn't have it.
I just never considered that the dsl modem was handling the PPPOE
negotiation.  

> 	If you look on one of your systems at the interface configuration and
> you see a netmask like 255.255.255.248, then I can almost guarantee that
> you have PPPOE, it's just being managed by that modem so you don't see
> the magic being performed under the hood.  You'll probably also find
> your default route is the .1 address in that /29 (which would be the
> modem's address on your side).  If you put the modem in "passthrough"
> mode, then you would have to manage the PPPOE yourself and you would
> find those addresses routed to you, through it.  In managed mode, you
> just use dhcp to pull down addresses, but they come from the modem.
> 
I'll take your word for this as I'd have to do some digging to find the
credentials for logging into the interface on the modem.

> 	A lot of people MAY have PPPOE and not realize it.  I've played with
> routers from BellSouth and Speed Factory and you can run them in managed
> mode, where they manage the PPPOE for you, or in passthrough mode where
> you are expected to manage that connection.  IIRC...  On at least some
> of the BellSouth provided dsl modems, you have to go to the "expert"
> side of the configuration menus to find that option, but it's there.
>