> Hi, > > I'm about to setup up ADSL at home for the first time, using the > following network topology: > > ADSL +-------+ +----------+ +----------+ > to <-----> | DSL |<-------> | firewall | <-----> | ethernet | > ISP | modem | pppoe | + router | | switch | > +-------+ | + nat | +----------+ > +----------+ | | | > V V V > to other computers > > The firewall/router/nat box is (will be when I get this setup) > an old 486 laptop with 2 pcmcia ethernet cards, running 3.9-stable. > (Yes, I've ordered a CD; until it arrives I'm using 3.8-stable.) > > I already have the (external) DSL modem, and from talking to other > Unix-savvy customers of my ISP (arcor.de), their setup is that the > DSL modem talks pppoe to me (in this case to my firewall/router/nat > box). From looking at the FAQ section 6, it seems I have two basic > options available doing this in OpenBSD: pppoe(4) in the kernal, and > pppoe(8) in userland. My question is, what are the relative > advantages/disadvantages of these? > > The obvious tradeoff is performance: I expect pppoe(8) to be slower > due to the extra kernel/user-space crossings for each packet. My > ADSL is 6M bits/sec downstream, 0.5M upstream. > > But are there other significant differences in > * support for pppoe features? > * ease of configuration? > * reliability?
I haven't been using pppoe(4) or pppoe(8) for very long, but I ended up going with pppoe(8) because it will automatically populate /etc/resolv.conf. I don't know of a trivial way to get pppoe(4) to do this. See this thread, for instance: http://groups.google.com/group/lucky.openbsd.misc/browse_thread/thread/8e91d354b340cb1c/334c6880e7cf3a38?lnk=st&q=openbsd++pppoe+resolv.conf&rnum=15&hl=en#334c6880e7cf3a38
