I can't even find the dhcp lease or the network broadcast info. When
I was with AT&T, it was basic DHCP and it all went into
/var/db/dhclient.leases. The only place I can get the IP from now is
You are not getting your address via DHCP, as you are using PPP which
does its own address negotiation. One of these days I will understand
the point of running PPP over ethernet...
The point is that established ISPs have everything hooked into the
server-side PPP authentication mechanism - billing, IP assignment (dynamic
for Joe User, static /32 for customer A who pays, static /28 for the local
small business customers) and goodness knows what else.
So for these ISPs, the easiest way of deploying DSL for these ISPs is via
PPPoE, as it uses the same back-end to administer things and just a
different set of link-layer hardware. Yes, the extra features of PPP
(framing, error correction, etc) are really just overhead, but it's a
tradeoff of "best administrative solution" vs "best technical solution".
The cable providers, OTOH, did it right - use the modem as a bridge, and use
DHCP for IP allocation and MAC addresses for user identification.
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