Re: 2.6.0-testX and pppd/pppoe stuck after connecting

Re: 2.6.0-testX and pppd/pppoe stuck after connecting

[Jan Ploski]

Andrew Borzenkov wrote:
>>> I can confirm it with 2.6.0-test8 and simple modem connection (no
>>> pppoe). Connection is established, I get IP, DNS - everything but no
>>> IP packet ever seems to either go out or come in. The same works just
>>> fine with 2.6.0-test5
>
> whatever evil it was it has apparently disappeared in test9. Which may be
> good or bad news for you depending on whether your problem is fixed here
> as well.

Unfortunately, nothing has changed for me with test9 - I just had my
ppp0 "stuck" in the very same manner as before. Still hoping for some
bits of advice from experts here...

Best regards -
Jan Ploski

Re: 2.6.0-testX and pppd/pppoe stuck after connecting

[Jan Ploski]

Hello,

This is for the archive and to close the thread which I started on
Sat, 25 Oct 2003.

I resolved my problem by recompiling the kernel with a different set
of enabled PPP options. More specifically, I appear to have enabled
*too many* options when I switched from 2.4 to 2.6. Therefore, I should
have attributed the problems that I encountered to differing kernel
configurations, not necessarily to different kernel versions.

pppd is working fine now for me. Unfortunately, I don't remember
the exact set of options that caused trouble. Nevertheless, if anyone
ever experiences similiar symptoms, this message might provide just
enough information to push their solution attempts in the right
direction.

Best regards -
Jan Ploski

Re: 2.6.0-testX and pppd/pppoe stuck after connecting

[Andrey Borzenkov]

>Andrew Borzenkov wrote:
>> I can confirm it with 2.6.0-test8 and simple modem connection (no
>> pppoe). Connection is established, I get IP, DNS - everything but no
>> IP packet ever seems to either go out or come in. The same works just
>> fine with 2.6.0-test5

whatever evil it was it has apparently disappeared in test9. Which may be good 
or bad news for you depending on whether your problem is fixed here as well.

good luck

-andrey

Re: 2.6.0-testX and pppd/pppoe stuck after connecting

[Jan Ploski]

Andrew Borzenkov wrote:
> I can confirm it with 2.6.0-test8 and simple modem connection (no
> pppoe). Connection is established, I get IP, DNS - everything but no
> IP packet ever seems to either go out or come in. The same works just
> fine with 2.6.0-test5

Thanks to everyone who has replied.

I just wanted to remark that I had earlier the same problem with
2.6.0-test4, so it seems strange to me that 2.6.0-test5 would work ok.

I upgraded pppoe to 3.5 in hope that it would help, but that was
probably pointless given that the same problem occurs in pure dialup
context.

I can also offer help with diagnosing, but I feel that I would need some
even more detailed guidance than Andrev (preferably in form of patches,
as I have zero experience with kernel debugging).

Regards -
Jan Ploski

Re: 2.6.0-testX and pppd/pppoe stuck after connecting

["Andrey Borzenkov"]

> Ever since I upgraded from 2.4.18 to 2.6.0-test? (now -test8),
> I have been encountering problems with my pppd/pppoe setup.
> Specifically, right after the ppp0 interface is brought up, and several
> packets go through that interface (4-5 packets RX/TX), no more packets
> are transmitted until I restart pppd and reconnect to my ISP.
> ping www.google.com will report 100% packet loss, and I cannot see the
> TX packet count on ppp0 increasing. Nothing suspicious appears in ppp.log.
> More often than not, I have to reconnect multiple times until at last
> a working connection is established.

I can confirm it with 2.6.0-test8 and simple modem connection (no pppoe). Connection
is established, I get IP, DNS - everything but no IP packet ever seems to either go out
or come in. The same works just fine with 2.6.0-test5; I have not tried intermediate
versions. Probably if test9 is going to have the same problem I will have to. This happens
every time on boot of test8 and works every time under test5

the system is Mandrake 9.2 without updates, compiler gcc-3.3.1 as shipped with
mdk 9.2. previous kernel was compiled under mdk 9.1 with whatever compiler it
had.

Enabling pppd debugging does not show anything interesting except it gets LCP
echo from remote so some data _is_ flowing between systems. Enabling iptables
LOG for all packets shows that packets _are_ submitted to ppp0.

So it looks like for whatever resons ppp0 either does not receive packet passed to it
or never processes them.

As my knowledge of networking layer is near to zero, I appreciate pointers to where
I can enable debugging, printk or whatever.

TIA

-andrey

Re: 2.6.0-testX and pppd/pppoe stuck after connecting

[Tim Schmielau]

On Sat, 25 Oct 2003, Jan Ploski wrote:

> I have been encountering problems with my pppd/pppoe setup.

I've never had any problems with pppoed in 2.[56]. (I am connected through
it right now).
There's one pitfall however: at least in the (somewhat rotten) SuSE 7.0
based setup I use, /etc/rc.d/pppoed explicitly checks the kernel version.
Since 2.6 perfectly works with the 2.4 settings, I just had to change the
case "2.4.*)" into "2.[456].*)"

Tim

Re: 2.6.0-testX and pppd/pppoe stuck after connecting

[Måns Rullgård]

Jan Ploski <jpljpl@gmx.de> writes:

> Ever since I upgraded from 2.4.18 to 2.6.0-test? (now -test8),
> I have been encountering problems with my pppd/pppoe setup.
> Specifically, right after the ppp0 interface is brought up, and several
> packets go through that interface (4-5 packets RX/TX), no more packets
> are transmitted until I restart pppd and reconnect to my ISP.
> ping www.google.com will report 100% packet loss, and I cannot see the
> TX packet count on ppp0 increasing. Nothing suspicious appears in ppp.log.
> More often than not, I have to reconnect multiple times until at last
> a working connection is established.
>
> I may have not included all required information, but I don't know what
> might be useful in diagnosing this problem (this knowledge would possibly
> let me correct it without posting). I believe it is kernel-related because
> with 2.4.x everything works fine in the same circumstances. The software
> versions are: pppd version 2.4.1, pppoe version 3.3 (from roaringpenguin.com)

FWIW, I'm sending this mail using pppd 2.4.1 and Roaring Penguin pppoe
3.5 on Linux 2.6.0-test8.  Occasionally, maybe one out of 10 times or
less, the connect times out, but I've attributed that to my ISP.

-- 
Måns Rullgård
mru@kth.se

2.6.0-testX and pppd/pppoe stuck after connecting

[Jan Ploski]

Hello,

Ever since I upgraded from 2.4.18 to 2.6.0-test? (now -test8),
I have been encountering problems with my pppd/pppoe setup.
Specifically, right after the ppp0 interface is brought up, and several
packets go through that interface (4-5 packets RX/TX), no more packets
are transmitted until I restart pppd and reconnect to my ISP.
ping www.google.com will report 100% packet loss, and I cannot see the
TX packet count on ppp0 increasing. Nothing suspicious appears in ppp.log.
More often than not, I have to reconnect multiple times until at last
a working connection is established.

I may have not included all required information, but I don't know what
might be useful in diagnosing this problem (this knowledge would possibly
let me correct it without posting). I believe it is kernel-related because
with 2.4.x everything works fine in the same circumstances. The software
versions are: pppd version 2.4.1, pppoe version 3.3 (from roaringpenguin.com)

I would be grateful if you CC'ed me in replies.

Best regards -
Jan Ploski