Very Computer

Hi,

I've posted before on this to 'comp.os.linux.networking', but have yet
to get any suggestions.  Any help would really be appreciated, since
I've spent a fair amount of time on this and tried quite a few tests
to no avail.  I can get my connection to completely freeze up just by
sending the linux-2.0.12.tar.gz file.

My system's a generic '486/40 with 16550A UART, 28.8 Motorola Power
modem and running Linux 2.0.13 with PPPD 2.2.0f.  My ISP uses a
Xylogics Annex 4000 and they have told me they have it set up to use
hardware flow control.  I doubt that this is a flow control problem
since I can send the file successfully using a terminal program and
Z-modem.  I suspect some interaction between PPPD and the Annex, since
I can also successfully send the Linux file with another PPP account I
have on a Gator box.  My PPP configuration is below:

38400
crtscts
modem
defaultroute
asyncmap 0
escape 11,13,ff
lcp-echo-interval 60
lcp-echo-failure 2
#debug
#kdebug 7

On one run, I also had the debugging options shown above enabled.
Here is the debug output just before the connection hung:

Aug 15 21:31:32 bix kernel: A7 8E 86 D1 49 10 39 D4 ....I.9.
Aug 15 21:31:32 bix kernel: 3D 10 87 6F 4B D1 79 11 =..oK.y.
Aug 15 21:31:32 bix kernel: 36 DF A0 DF E5 A8 76 49 6.....vI
Aug 15 21:31:32 bix kernel: 5F 45 C3 C0 E8 1E 68 06 _E....h.
Aug 15 21:31:32 bix kernel: 96 B4 65 C3 3C 81 41 1B ..e.<.A.
Aug 15 21:31:32 bix kernel: 0E BF 6D D1 A3 F9 31 BC ..m...1.
Aug 15 21:31:32 bix kernel: 08 4C D7 D1 70 88 F2 18 .L..p...
Aug 15 21:31:32 bix kernel: FA 36 B6                .6.
Aug 15 21:31:32 bix kernel: ppp_dev_xmit_lower: fcs is 2529
Aug 15 21:31:32 bix kernel: ppp_dev_xmit: writing 1481 chars
Aug 15 21:31:32 bix kernel: ppp_dev_xmit [ppp0]: skb 00ec9668
Aug 15 21:31:37 bix kernel: ppp_dev_xmit [ppp0]: skb 00ec9668
Aug 15 21:31:40 bix kernel: ppp_tty_read: called buf=08013702 nr=1504
Aug 15 21:31:40 bix kernel: ppp_tty_read: no data (EAGAIN)
Aug 15 21:31:46 bix kernel: ppp_dev_xmit [ppp0]: skb 00466284
Aug 15 21:31:50 bix last message repeated 5 times
Aug 15 21:31:55 bix kernel: ppp_dev_xmit [ppp0]: skb 00466888
Aug 15 21:31:58 bix last message repeated 3 times
Aug 15 21:32:01 bix kernel: ppp_dev_xmit [ppp0]: skb 00ec9668
Aug 15 21:32:02 bix kernel: ppp_dev_xmit [ppp0]: skb 00466888
Aug 15 21:32:10 bix kernel: ppp_dev_xmit [ppp0]: skb 00466888
Aug 15 21:32:24 bix pppd[26189]: sent [LCP TermReq id=0x2]

The last line represents my sending the 'pppd' process a HUP signal
after verifying the connection was indeed hung.  And here's from the
informational messages:

Aug 15 21:31:21 bix kernel: 6E 9C 17 27 BF 1C ..n..'..
Aug 15 21:31:21 bix kernel: 7>AB CA 9B 31 4E 79 5F 10 ...1Ny_.
Aug 15 21:31:24 bix kernel:  72 08 08 82 10 8F =.r.....
Aug 15 21:31:26 bix kernel: B 43 9C A2 63 C2 7F ..C..c..
Aug 15 21:31:28 bix kernel: 8F 09 3D 38 F9 7E F1 m..=8.~.
Aug 15 21:31:29 bix kernel:  0B 2A 15 07 7C CA FC Q.*..|..
Aug 15 21:31:30 bix kernel:  F5 CF 4D B4 A4 ,.(..M..
Aug 15 21:31:40 bix kernel: ppp_tty_ioctl: read demand dial info
Aug 15 21:32:24 bix kernel: ppp: channel ppp0 going down for IP
packets!

Lastly, my ISP tells me that the latest version of Trumpet works
without a hitch on the Annex and that they have some Linux boxes with
PPP connections that hang on occasion as well.  Anyone have any ideas?

Thanks!

Roy Bixler

--
"It's a damn poor mind that can only think of one way to spell a word."
                -- Andrew Jackson

Quote:>Lastly, my ISP tells me that the latest version of Trumpet works
>without a hitch on the Annex and that they have some Linux boxes with
>PPP connections that hang on occasion as well.  Anyone have any ideas?

Thanks,
Roy Bixler

http://bix.suba.com/~rcb/
--
"It's a damn poor mind that can only think of one way to spell a word."
                -- Andrew Jackson

I wrote (more or less, anyway):

Quote:>> I can get my connection to completely freeze up just by
>>sending the linux-2.0.13.tar.gz file.

>>My system's a generic '486/40 with 16550A UART, 28.8 Motorola Power
>>modem and running Linux 2.0.14 with PPPD 2.2.0f.  My ISP uses a
>>Xylogics Annex 4000 and they have told me they have it set up to use
>>hardware flow control.  I doubt that this is a flow control problem
>>since I can send the file successfully using a terminal program and
>>Z-modem.  I suspect some interaction between PPPD and the Annex, since
>>I can also successfully send the Linux file with another PPP account I
>>have on a Gator box.  My PPP configuration is below:

>>38400
>>crtscts
>>modem
>>defaultroute
>>asyncmap 0
>>lcp-echo-interval 60
>>lcp-echo-failure 2

http://www.veryComputer.com/~bix/pkt_trace.txt

For some mysterious reason, this time I got almost half-way through
the file (i.e. 3. Meg.) before the connection hung, so this is a bit
longish (350k).  (And, you guessed it, I don't put it on
'bix.suba.com' because I don't want people* my connection
trying to help me. :-) )

Help anyone?

Thanks again ...

Roy Bixler

http://www.veryComputer.com/~rcb/
--
"It's a damn poor mind that can only think of one way to spell a word."
                -- Andrew Jackson