kanour-xen
2007-Nov-22 13:03 UTC
[Xen-users] Re: pppoe domU: did you test userspace rp-pppoe?
Peter Jakobi wrote:> Hi Jiri, > > you already tested an ancient userspace-only rp-pppoe? > I''ve still one active, and trying this you could validate > your the rest of your setup, before looking at possible > kernel changes anew (strace, ltrace, logs, whatever)... >Hi Peter. No I did not. Do I have to compile it? Can you give me more info what to do? Don''t know too much about it but I could not find a debian package for this. I just though that the rp-pppoe is loaded: Nov 22 11:50:20 alsfw01 pppd[1542]: Plugin rp-pppoe.so loaded. Nov 22 11:50:20 alsfw01 pppd[1542]: Linux kernel does not support PPPoE -- are you running 2.4.x? Nov 22 11:50:20 alsfw01 pppd[1542]: Exit. What is the difference between the rp-pppoe.so and the one which you are talking? Thanks for info Jiri _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
kanour-xen
2007-Nov-23 11:12 UTC
[Xen-users] Re: pppoe domU: did you test userspace rp-pppoe?
Peter Jakobi wrote:> On Fri, Nov 23, 2007 at 12:03:46AM +1100, kanour-xen wrote: >> I just though that the rp-pppoe is loaded: >> Nov 22 11:50:20 alsfw01 pppd[1542]: Plugin rp-pppoe.so loaded. >> Nov 22 11:50:20 alsfw01 pppd[1542]: Linux kernel does not support PPPoE -- >> are you running 2.4.x? >> Nov 22 11:50:20 alsfw01 pppd[1542]: Exit. >> >> What is the difference between the rp-pppoe.so and the one which you are >> talking? > > ok, here''s what I came up with on looking at more recent systems > (but I cannot either remember or find why I avoided the original > kernel space version at around suse 7 or 8 and how that differed > on dial-on-demand; and there''s not much to find online dated > more recent than end of ''03, which argues for the stability of > the current solution). > > > > looks like kernel and standalone rp pppoe implementations > are still at least somewhat distinct: > > kernel: > /lib/modules/2.6.22-14-generic/kernel/drivers/net/pppoe.ko > > depending on the kernel pppoe: > /usr/lib/pppd/2.4.4/rp-pppoe.so > libc.so.6 => /lib/libc.so.6 (0x00002b3e7ed7b000) > /lib64/ld-linux-x86-64.so.2 (0x0000555555554000) > loaded with passprompt.so and stuff into a pppd. > > so you should have a closer look at the pppd, not just the kernel. > > > fully userspace: > /usr/sbin/rp-pppoe > > > > some years ago, the pppd could be started with a userspace pppoe like this: > > export EIF=eth2 # or similar - your external interface on the firewall > pppd pty "/usr/local/dist/DIR/pppoe/pppoe -m 1412 -I $EIF" noipdefault passive hide-password name "ACCOUNTNAME" idle 601 maxconnect 84500 > > - the pty script option still exists (at least in the manpage). > - works with both the original code by luke stras (1999) > - and the rp-pppoe in version 1.3 [I think I''m sill using the compiled > from source version, and I''ve patched at least the stras one to cope > with the packet format peculiarities of t-online] > - as far as I''ve read in the docs and manpages, it should still work > when you install the pppoe/rp-pppoe package. > WITHOUT depending on anything in the kernel. > - note that the above way to invoke pppd by script is avoiding > pretty much all of your distro''s configuration, network wrapping, > probably including protection via firewall (excluding of course > problems via the default settings of the firewall), > and a slew of pppd settings. > - There should be options in /etc/ppp to allow running the pppd > the standard distro way of the week with either kernel or > standalone pppoe, resulting finally in commands similar to > the above. Upto graphical frontends. But maybe the major > distros have stabilized and do less messing up a working > network config files and arch by now. > > > > funny: I''ve the .so on a recent system (not the old 1.3 I''m actually > using on my (old) firewall) as part of the ppp package. Without the > package pppoe being installed. > > Looks like for e.g. ubuntu, rp-pppoe as a standalone [not using the .so] > is placed into the package pppoe, while a library version with less > support files, but depending on kernel pppoe has been folded into > pppd (the .so). > > On fedora (e.g. centos 4.3), it''s rp-pppoe instead for the standalone > and ppp for pppd with the .so file. > > > > In general, less processes is better, so kernel pppoe module first, > then rp-pppoe standalone. Ease of use winner for me however was > (anno 2000) the rp-pppoe standalone. [I seem to remember the early > kernel pppoe being somewhat differently to use, with arguments to > avoid userspace to gain speed. But that might have been SuSE specific. > Currently it looks like it''s always just using pppd for both cases, with > possibly the non-control packages handled only in kernel, and the > .so / pppoe kernel module enabling using an overloaded ethX as a > pty acc. to the docs (to validate ?). A possible speedup might > be to try configuring for "synch." ppp, which might take less cpu > (to validate)]. > > Using pppd with the standalone rp-pppoe should still work on _any_ > kernel, _without_ loading pppoe modules. > > Using pppd with the plugin seems to depend on modprobe pppoe > [see /usr/share/doc/ppp/README.pppoe; they might have removed some > of the package handling in the .so]. You should be able to autoload > the kernel module by adding "alias net-pf-24 pppoe" to /etc/modules.conf. > > In both cases you still use the pppd as userspace front end, > in the standalone case however, the rp-pppoe program does all the lifting, > whereas with kernel pppoe / .so, some of the processing has been moved from > the early userspace down into the device layer of the kernel > (Documentation/networking/ppp_generic.txt; somewhat dated and still talking > about 2.4). But the more universal pppoe implementation seems to still be > the userspace one. >Hi Peter. Thank you for this extensive explanation. It is good to know this. However, if read my thread the problem was solved by installing udev. Yes, it was so simple. As soon as I installed udev in domU, the error messages didn''t come up and pppd started to work. Thanks for your efford. Jiri _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users