From owner-freebsd-net@FreeBSD.ORG  Thu Jul 12 01:43:05 2007
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Date: Wed, 11 Jul 2007 19:14:03 -0600
To: Mike Tancsa <mike@sentex.net>
From: Brett Glass <brett@lariat.net>
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Cc: freebsd-net@freebsd.org
Subject: Re: Bug in userland PPP LQR?
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At 06:23 PM 7/11/2007, Mike Tancsa wrote:
 
>Did you try and use just LCP echo mode instead ?  I have come across a
>number of devices (especially GPRS/EVDO cards) that seem to say yes to
>supporting LQR, but do not.  Try instead lcp echo

I will try it. (To be more specific, I am going to try 

disable lqr
allow lqr
enable echo
echoperiod 12

so that the peer can get LQR if it requests it.) But since this would 
just be working around the bug I think might be there, it would also 
be a good idea to look at how the LQR counter is managed. From what
I can see, the problem is that the counter either is cumulative or
counts irrevocably up to 5 after one LQR packet is missed. The
reason why I'd like to see more eyes than my own on this is that
it's difficult to see how and where the LQR routines are invoked
and how they react to a pattern of missed and un-missed packets.

--Brett