Subject: Re: network hang
To: Jukka Marin , Wailer <firstname.lastname@example.org>
From: Brain fried. Explanation is in file "core". <email@example.com>
Date: 09/12/1997 21:45:20
AHA! I'm NOT the only one!
* > I'm using netbsd as a gateway/workstation. P133/32 with scsi disks.
* > I'm having an issue which I've seen off and on for a very long time
* > in which the network just clogs up and ceases to move. I run ppp over
* > a v.34 modem attached to a 16550. Lockups appear to occur with
* > heavy network use, but not always. This last one happened while a
* > client was running cu-seeme, so heavy udp use.
Jukka Marin sez:
/* So your PPP links locks up and starts working only after a modem disconnect
* and redial? I see this every now and then on all my NetBSD 1.2 boxes. I
* was hoping this problem had been solved by the com driver changes in
* -current. I thought there was a handshake problem in the com driver which
* sometimes prevented data transmission.. but maybe it's not that, then. I
* haven't used an RS tester to see the state of the handshake signals but
* I guess I should do that sometime. My PPP link usually stays up for a few
* days in a row, but on a 486 system we see the problem a few times a day.
I don't think it's com specific, though -- I'm using a SPARCstation IPX
[I've just been back and forth a little bit with this on port-sparc; no
further info just yet...] and I have the exact same problem!
I experience such anomalies as:
'ftp get' works ok to a point (most of a large (1.3MB) file), and
then kind of bellies up, eventually timing out with Connection reset.
'ftp reget' gets about 12-13kB more and does the above.
Speed: 19200 (38400 gives "zs0a: fifo overrun"), USRobotics Sportster 28.8
with compression enabled; pppd with deflate 15/bsdcomp 15, no vj compression
(since that broke on me once). Oh well.
* The problem only affects one PPP link at a time, so I don't think it's
* a generic networking problem (Ethernet always works just fine).
No, but it's certainly not restricted to com*.
Humanocentric religions and ways of life have proven to be our undoing.