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Bug 6993

Summary: Problems with VJ compression with PPP
Product: [Retired] Red Hat Linux Reporter: Tom Cross <tomc>
Component: pppAssignee: Nalin Dahyabhai <nalin>
Severity: medium Docs Contact:
Priority: medium    
Version: 6.1   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2003-01-24 23:31:23 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Tom Cross 1999-11-13 22:57:08 UTC
I have a RedHat 6.1 box with Dual Pentium-Pro processors.  The RH6.1
install correctly identified this and I'm currently using 2-2.12-20smp for

When I try to connect via PPP to the internet, I get the following in
Nov 13 14:59:15 hal diald[1121]: Running pppd (pid = 1197).
Nov 13 14:59:15 hal modprobe: can't locate module char-major-108
Nov 13 14:59:15 hal pppd[1197]: pppd 2.3.10 started by root, uid 0
Nov 13 14:59:15 hal pppd[1197]: Using interface ppp0
Nov 13 14:59:15 hal pppd[1197]: Connect: ppp0 <--> /dev/ttyS0
Nov 13 14:59:21 hal pppd[1197]: Remote message: Login Succeeded
Nov 13 14:59:48 hal pppd[1197]: Connection terminated.
Nov 13 14:59:48 hal pppd[1197]: Exit.

I enabled debug for pppd and found this:

Nov 13 16:32:09 hal pppd[752]: rcvd [PAP AuthAck id=0x2 "Login Succeeded"]
Nov 13 16:32:09 hal pppd[752]: Remote message: Login Succeeded
Nov 13 16:32:09 hal pppd[752]: rcvd [IPCP ConfReq id=0x1 <compress VJ 0f00>
Nov 13 16:32:12 hal pppd[752]: rcvd [IPCP ConfReq id=0x2 <compress VJ 0f00>
Nov 13 16:32:15 hal pppd[752]: rcvd [IPCP ConfReq id=0x3 <compress VJ 0f00>
Nov 13 16:32:18 hal pppd[752]: rcvd [IPCP ConfReq id=0x4 <compress VJ 0f00>
Nov 13 16:32:22 hal pppd[752]: rcvd [IPCP ConfReq id=0x5 <compress VJ 0f00>

It LOOKS like it can't to VJ header compression.  I thought it might have
been a mis-compiled kernel so I recompiled make sure PPP was checked as a
module (it was).  My new kernel still did not work.

I will try this with a UP and post the results.

Is there a known problem with PPP/SMP/VJ?

Comment 1 Tom Cross 1999-11-15 17:23:59 UTC
I tried the Uniprocessor kernel that the installer installed for me and I had
exactly the same results with PPP and VJ.

Comment 2 Michael K. Johnson 1999-11-19 21:38:59 UTC
No, it can certainly do vj compression.

Can you give me the output of
rpm -q ppp initscripts


Comment 3 Tom Cross 1999-11-19 21:51:59 UTC
[tomc@hal tomc]$ rpm -q ppp initscripts

I forgot to mention that I have basically done a rpm -UvhF *.rpm from the 6.1
updates directory.

Comment 4 Nalin Dahyabhai 2000-02-29 14:24:59 UTC
Others have reported that adding "novj" to their /etc/ppp/options file improves
things for them.  This is too rare an occurrence to be sure it's a bug in the
Linux ppp driver -- what kind of system is on the other end of the line?

Comment 5 Stephen John Smoogen 2003-01-24 23:31:23 UTC
Bug 6993 is being closed because bug was needing info since 2000, and neither
original bug reporter or others added any information.