hello all,
I'm using Mandrake 8.1 (stock everything, haven't built the kernel
or pppd or ppp tools or much of anything from sources on this
notebook) and am connecting to netcom using wvdial. For
monitoring purposes, i have a process continuously sending pings
to a good IP. Since this box is dual-boot, i've tested ppp
using Windows using all the same hardware and phone line and
I don't have the problem discussed below in Windows. Init
strings to the modem are generic. I send ATZ and AT&F0
in windows and in linux.
Problem:
PPP communication will sometimes completely go away. What I
mean by this is:
pppd and wvdial keep running (they don't die the way I'd
expect them to if the connection went down).
ifconfig says that ppp0 is still fine (no errors being
registered). There are no new TX or RX packets nor
are there any ppp errors displayed by ifconfig ppp0,
even while I have a second process pinging a good
host and (just for testing tcp) a third process
trying to ssh or telnet to port 110 to another good
host (both good hosts being on the other side of the
ppp connection).
Sometimes this will happen when the only data going through the
pipe is the ping but that's very rare. More commonly, it
happens when I try to surf to more than one site at the same time
or download (http, ftp, sftp, doesn't matter) more than one file
at a time. It happens when I'm using Opera, it also happens
when I'm using links (no opera running at all, just two or
more links instances).
It's pretty clear it's not the ISP since I don't have problems
in Windows. It's not the init strings either since I've
simplified both the Windows and Linux init strings to be just
ATZ AT&F0
Has anyone seen this? Or does anyone have suggestions?
thanks for any assistance.
tiger
_
Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph
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