Very Computer

by **Dan Cincer** » Thu, 25 Apr 1996 04:00:00

I have linux kernel 1.2.1, pppd 2.1.2 (from slakware) running
on a 486 system with a 28.8 modemblaster on /dev/ttyS1. When
I first connect to my ISP, the speed for ftp, telnet, etc. seems to be
ok, but then slowly (within a minutes time) the connection speeds
go bad. Finally, netscape shows nothing being transferred and
says (stalled) at the bottom. The strange thing is, ping still
responds with an OK time, but lost a lot of packets.

I ran netstat -i while this was happening and saw that the RX-ERR column
lost a LOT of packets. I first set the modem speed to 38400, but I
bumped it down to 19200. This did not help. Any ideas, anyone?

Regards,

Dan

by **Charlie Kempso** » Thu, 25 Apr 1996 04:00:00

> I have linux kernel 1.2.1, pppd 2.1.2 (from slakware) running
> on a 486 system with a 28.8 modemblaster on /dev/ttyS1. When
> I first connect to my ISP, the speed for ftp, telnet, etc. seems to be
> ok, but then slowly (within a minutes time) the connection speeds
> go bad. Finally, netscape shows nothing being transferred and
> says (stalled) at the bottom. The strange thing is, ping still
> responds with an OK time, but lost a lot of packets.

> I ran netstat -i while this was happening and saw that the RX-ERR column
> lost a LOT of packets. I first set the modem speed to 38400, but I
> bumped it down to 19200. This did not help. Any ideas, anyone?

> Regards,

> Dan

Is your modem external? If so, check that you have 16550 UARTs
on your machine. It sounds to me like you are overrunning your
serial port's buffers, hence all the lost data. If your modem
is internal then it is very likely to have 16550's, so that won't
be the problem. If you do find that dodgy serial chips are to
blame, running at a still slower speed might help, but better to
upgrade the chips if possible.

Hope this is of some help,

Charlie
--
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http://public.logica.com/~kempsonc
#include <std/disclaimer.h>

by **Joe Hanc** » Sat, 27 Apr 1996 04:00:00

> I have linux kernel 1.2.1, pppd 2.1.2 (from slakware) running
> on a 486 system with a 28.8 modemblaster on /dev/ttyS1. When
> I first connect to my ISP, the speed for ftp, telnet, etc. seems to be
> ok, but then slowly (within a minutes time) the connection speeds
> go bad. Finally, netscape shows nothing being transferred and
> says (stalled) at the bottom. The strange thing is, ping still
> responds with an OK time, but lost a lot of packets.

> I ran netstat -i while this was happening and saw that the RX-ERR column
> lost a LOT of packets. I first set the modem speed to 38400, but I
> bumped it down to 19200. This did not help. Any ideas, anyone?

> Regards,

> Dan

I had this problem before and it turned out to be that I didn't have
hardware flow control enabled in the modem. Changing that cleared
everything up.

Joe

Very Computer

PPP Slows to crawl - Netscape stalls - Ideas?

PPP Slows to crawl - Netscape stalls - Ideas?

PPP Slows to crawl - Netscape stalls - Ideas?

PPP Slows to crawl - Netscape stalls - Ideas?