Date: Mon, 27 Nov 95 22:44:00 W From: Angelo Turetta <turetta@trust.stylo.it> To: "'SMTP:amurai@spec.co.jp'" <amurai@spec.co.jp>, freebsd-questions <freebsd-questions@freebsd.org> Subject: 16550 SIO & user level PPP. Message-ID: <30BA3358@trust.stylo.it>
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Hi,
I didn't receive an answer to my previous message, so please Cc: any reply
directly to me: I'm not on this list.
I've set up a FreeBSD 2.05R machine acting as a dial-up gateway to the
Internet for my LAN. I'm using ppp (ijppp 0.94) in auto mode to connect to
my ISP, and I've noticed a strange behaviour: when I send out packets at
full line speed (V34 modem on a 38400bps 16550) for more than just a few
seconds, ppp hangs. I haven't got any problem receiving at full band.
The easiest way to produce this locking is to try to 'ftp put' a 300-500KB
file on my ISP's server, or to send them a large mail attachment. Given the
fast response from the remote end, the modem has its TX led always lit, and
TR led blinking, as it periodically pauses the PC from sending data: then,
suddenly the modem hangs up, and ppp never tries to restore the connection
(as it would on transient line drop.)
Even if I try to trigger a dial event from another console, nothing happens.
Only way out, 'kill -TERM' ppp process and restart it.
Do you think this may depend on bad configuration of the SIO chip? It's
correctly probed as 16550 at boot: is there something special to do to
enable the FIFO queue?
I have LQR disable & LQR deny in my ppp.conf: do you think this can be a
problem?
I attach some data to help you diagnose my problem.
Thanks for any help
Angelo.
(configuration items from a sample 'telnet localhost 3000' session...)
=====================================================
ppp ON unix> display
Current configuration option settings..
Name My Side His Side
----------------------------------------
vjcomp enable accept
lqr disable deny
chap disable accept
pap disable accept
acfcomp enable accept
protocomp enable accept
pred1 enable accept
proxy disable deny
ppp ON unix> show proto
Protocol in out Protocol in out
IP : 1820, 2489 VJ_UNCOMP: 1388, 1989
VJ_COMP : 7122, 6062 COMPD : 0, 0
LCP : 3198, 3158 IPCP : 80, 80
CCP : 0, 40 PAP : 0, 0
LQR : 0, 0 CHAP : 0, 0
Others : 0, 0
ppp ON unix> show compress
Out: 6062 (compress) / 8051 (total) 596 (miss) / 10998 (search)
In: 7122 (compress), 1388 (uncompress) 0 (error), 0 (tossed)
ppp ON unix> show modem
device: /dev/cuaa2 speed: 38400
cs8, none parity
connect count: 40
outq: 1
DialScript = ABORT BUSY ABORT NO\sCARRIER TIMEOUT 5 "" ATE1Q0 OK-AT-OK
\dATDT\T TIMEOUT 40 CONNECT
LoginScript = TIMEOUT 5 name:-\rname: xxxxx word: xxxxxx\r
PhoneNumber = xxxxxx
ppp ON unix> show debug
01: Phase
===================================================
Here follows a commented PPPLOG file section relative to a multiple hang
session. Notice that after the second hang, ppp survived at least two line
drops (then I stopped my testing...): I mean, after hanging the usual way,
it re-issued a dial when solicited from another console. Anyway, this is not
the common behaviour: it usually ends normal operations after that error,
though it still accepts telnet sessions.
11-16 23:23:07 [259] Using interface: tun0
11-16 23:23:07 [260] Listening at 3000.
11-16 23:23:07 [260] PPP Started.
dial OK!
login OK!
11-16 23:25:37 [260] *Connected!
11-16 23:25:39 [260] Phase: Authenticate
11-16 23:25:39 [260] his = 0, mine = 0
11-16 23:25:39 [260] Phase: Network
11-16 23:25:39 [260] OsLinkup: 194.20.20.7
write: No such process
---- ( ... 10 more lines identical to the previous one: omitted ... )
---- ( BTW, what are they for? Thay waste a lot of space in log files :-()
-------------- IN THE MEANWHILE, A FTP PUT WAS STARTED
11-16 23:39:51 [260] Disconnected!
-------------- FIRST HANG OCCURS !!
11-16 23:39:51 [260] Connect time: 854 secs
11-16 23:39:51 [260] Phase: Dead
11-16 23:39:51 [260] OsLinkdown: 194.20.20.7
11-16 23:39:51 [260] Phase: Terminate
-------------- kill -TERM 260
11-16 23:40:26 [260] SIGTERM
write: No such process
---- ( ... 13 more lines identical to the previous one: omitted ... )
11-16 23:40:26 [260] PPP Terminated.
-------------- Restarted ppp -auto. Re-triggered dial: after a couple
-------------- of minutes the transfer automatically resumes
11-16 23:40:35 [625] Using interface: tun0
11-16 23:40:35 [626] Listening at 3000.
11-16 23:40:35 [626] PPP Started.
dial OK!
login OK!
11-16 23:41:20 [626] *Connected!
11-16 23:41:22 [626] Phase: Authenticate
11-16 23:41:22 [626] his = 0, mine = 0
11-16 23:41:22 [626] Phase: Network
11-16 23:41:22 [626] OsLinkup: 194.20.20.7
write: No such process
-------------- SECOND HANG OCCURS !!
11-16 23:44:22 [626] Disconnected!
11-16 23:44:23 [626] Connect time: 183 secs
11-16 23:44:23 [626] Phase: Dead
11-16 23:44:23 [626] OsLinkdown: 194.20.20.7
11-16 23:44:23 [626] Phase: Terminate
11-16 23:44:47 [626] SIGTERM
write: No such process
write: No such process
write: No such process
11-16 23:44:47 [626] PPP Terminated.
-------------- Restarted ppp -auto
11-16 23:44:59 [675] Using interface: tun0
11-16 23:44:59 [676] Listening at 3000.
11-16 23:44:59 [676] PPP Started.
dial OK!
login OK!
11-16 23:45:23 [676] *Connected!
11-16 23:45:25 [676] Phase: Authenticate
11-16 23:45:25 [676] his = 0, mine = 0
11-16 23:45:25 [676] Phase: Network
11-16 23:45:26 [676] OsLinkup: 194.20.20.7
write: No such process
-------------- THIRD HANG OCCURS !!
11-16 23:47:33 [676] Disconnected!
11-16 23:47:33 [676] Connect time: 130 secs
11-16 23:47:33 [676] Phase: Dead
11-16 23:47:33 [676] OsLinkdown: 194.20.20.7
11-16 23:47:33 [676] Phase: Terminate
dial OK!
login OK!
11-16 23:48:54 [676] *Connected!
11-16 23:48:56 [676] Phase: Authenticate
11-16 23:48:56 [676] his = 0, mine = 0
11-16 23:48:56 [676] Phase: Network
11-16 23:48:57 [676] OsLinkup: 194.20.20.7
write: No such process
-------------- FOURTH HANG OCCURS !!
11-16 23:49:42 [676] Disconnected!
11-16 23:49:42 [676] Connect time: 48 secs
11-16 23:49:42 [676] Phase: Dead
11-16 23:49:42 [676] OsLinkdown: 194.20.20.7
11-16 23:49:42 [676] Phase: Terminate
dial OK!
login OK!
11-16 23:51:05 [676] *Connected!
11-16 23:51:08 [676] Phase: Authenticate
11-16 23:51:08 [676] his = 0, mine = 0
11-16 23:51:08 [676] Phase: Network
11-16 23:51:08 [676] OsLinkup: 194.20.20.7
-------------------------------------------------------------------
Angelo Turetta
System Administrator - Stylo Multimedia - Italy
<aturetta@stylo.it>
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