problems with PPP and the new 2.2 pre kernels

bwoodard@cisco.com
Fri, 08 Jan 1999 06:57:19 -0800

In testing the new 2.2pre1 release I've stumbled across a bit of an
inexplicable problem with PPP. Basically with 2.0.36 my PPP session
works fine with both my phone based modem and my ricochet wireless
modem. However, with the 2.2-pre1 kernel and quite a few kernels back
(I stopped testing with 2.1.128), my phone modem works just fine but
my ricochet modem doesn't work right. It is quite interesting. I am
able to get a ficochet connection, an IP address, send and receive UDP
packet but I cannot establish a TCP connection. This of course makes
it very difficult to conduct normal work. Everything appears correct
in the logs except I don't seem to be finding some of the ppp-compress
modules that it wants to use (I didn't think that this mattered for
anything except speed but it is the only clue I have.)

Jan 7 19:02:09 trill pppd[17197]: Serial connection established.
Jan 7 19:02:10 trill pppd[17197]: Using interface ppp0
Jan 7 19:02:10 trill pppd[17197]: Connect: ppp0 <--> /dev/ttyS0
Jan 7 19:02:16 trill modprobe: can't locate module ppp-compress-21
Jan 7 19:02:16 trill modprobe: can't locate module ppp-compress-26
Jan 7 19:02:17 trill modprobe: can't locate module ppp-compress-24
Jan 7 19:02:20 trill modprobe: can't locate module ppp-compress-21
Jan 7 19:02:20 trill modprobe: can't locate module ppp-compress-26
Jan 7 19:02:20 trill modprobe: can't locate module ppp-compress-24
Jan 7 19:02:21 trill pppd[17197]: local IP address 171.68.11.194
Jan 7 19:02:21 trill pppd[17197]: remote IP address 171.68.11.195

Finally, on the ricochet modem, I can see what appears to be a syn but
I never see the ack come back.

I am running pppd version 2.3 patch level 5 on RH 5.2

Is this in fact a bug with the kernel or can it be attributed to a
misconfiguration that is for some reason accepted under 2.0.36?

-ben

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