ppp instabilities?

[Peter Ulrich Kruppa]

On Sat, 1 May 2004, Cordula's Web wrote:

> > My system is
> > FreeBSD pukruppa.net 5.2-CURRENT FreeBSD 5.2-CURRENT
> > #0: Wed Apr 28 23:06:14 CEST 2004 .
> >
> > I am running userland ppp with -nat and -ddial options to connect
> > to my DSL/Internet Service Providers (T-Kom and kamp-dsl in
> > Germany, via PPPoE).
> >
> > During the last four or five weeks my connection went down very
> > often and didn't start again - which should be granted by -ddial.
> > My providers of course swear this isn't their fault and of course
> > my DSL bridge or my NIC might be defect some way.
> > Usually I can restart my connection by rebooting my machine.
>
> This typically happens when your ISP switches equipment (or
> simply reloads your peer router. For a strange reason,
> ppp doesn't notice that the PAD session is dead, and
> therefore doesn't try to reconnect.
>
> You have two options here:
>
> 1. Log into ppp (pppctl /var/run/internet), and at the
>    PPP prompt, issue a close command. ppp will notice
>    and will shutdown the connection. If you used -ddial,
>    it will try to reestablish the connection by its own [*]
Yes, indeed. It will try about 20 min, then the connection is
reestablished.
But how do I tell my providers about all this?

Thanks so far,

Uli.

>
> 2. Fix the code in ppp (or ng_pppoe?) so that it doesn't
>    depend only upon PADS keep-alives [**].
>
> Notes:
>
> [*] Some routers need a lot of time to come back online.
>     You may need anytime from 1 minute to 30 minutes or so,
>     just tail -f /var/log/ppp.log  in the meantime
>
> [**] Many ADSL ISPs peer with DSL providers. The DSL
>      provider's DSLAM equipment may be still okay
>      and send PADS confirmations when asked by ppp,
>      but the ISPs router may not be ready. When the
>      ISPs router comes back online, it will happily
>      disregard those dead ADSL sessions. Argh...
>
> BTW, I'm not speculating here. I've confirmed thrice with my
> ISPs that they rebooted my peer router exactly when ppp
> behaved as you've just described.
>
> > My ppp configs should be okay: I am using them for more than a
> > year now without any problems.
> >
> > So here my two questions:
> > 1) Does anyone else see this behavior on -CURRENT?
> > 2) Are there any logs or tools I can use to analyze this
> >    behaviour?
> >
> >
> > Thanks for all hints,
> >
> > Uli.
> >
> > 	+---------------------------+
> > 	|    Peter Ulrich Kruppa    |
> >         |         Wuppertal         |
> >         |          Germany          |
> >         +---------------------------+
>
> Cheers,
> -cpghost.
>
> --
> Cordula's Web. http://www.cordula.ws/
>
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	+---------------------------+
	|    Peter Ulrich Kruppa    |
        |         Wuppertal         |
        |          Germany          |
        +---------------------------+