Subject: Re: Strange PPP behaviour during file uploads.
To: Dave Burgess <burgess@cynjut.neonramp.com>
From: Michael L. VanLoon -- HeadCandy.com <michaelv@HeadCandy.com>
List: current-users
Date: 07/22/1996 22:48:24
>I have been running NetBSD-current for some time, and recently noticed
>an odd situation. I was FTPing a file from one part of my ISPs LAN to
[...]
>When I am transferring files TO cynjut, I generally have very few
>problems: I regularly get transfer rates higher than 28.8K.
>When I transfer files FROM cynjut, I get good throughput for a while,
>then the modem just hangs up. It redials, tries to connect and fails.
>The next time the modem redials, I get in just fine. The transfer
>continues as soon as the PPP link is estabnlished and continues for as
>little as a second and as long as a couple minutes. The cycle is then
>repeated (dies, dials, fails to log in, redials, connects). The entire
[...]
In other words, you can receive files on such on your NetBSD box, over
the PPP link, just fine. But, if you try to put/send stuff, it gives
you lots of lossage and hangups.
Have you tried telnetting in from the Internet?
I can do stuff where I go out, but most of the traffic is coming in
(telnet, ftp, sup, etc.) on my NetBSD box. But, when I try to telnet
in from the Internet (where most of the display traffic is going out
from my box), I get horrible lossage. Lots of many-second hangs,
modem hang-ups, etc. I get this in /var/log/debug when it hangs up:
Jul 22 16:48:00 MindBender pppd[4635]: No response to 4 echo-requests
Jul 22 16:48:00 MindBender pppd[4635]: Serial link appears to be disconnected.
Jul 22 16:48:06 MindBender pppd[4635]: Connection terminated.
Telneting in from work is almost not worth trying. I usually get a
closed connection several times before getting all the way logged in.
Once I do finally get all the way in, the connection is very
"delicate", and can be broken easily by causing too much display
traffic.
I too have a Livingston Portmaster on the remote (Internet) end of my
link, though it is an older model.
Anyone with a clue about PPP and Portmasters care to enlighten?
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Michael L. VanLoon michaelv@HeadCandy.com
--< Free your mind and your machine -- NetBSD free un*x >--
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Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
NetBSD ports in progress: PICA, others...
Roll your own Internet access -- Seattle People's Internet cooperative.
If you're in the Seattle area, ask me how.
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