Re: Mobile Broadband - disconnect after 2 mins.

[Dan Williams <dcbw redhat com>]

On Thu, 2008-10-23 at 13:48 -0400, Dan Williams wrote:
> On Thu, 2008-10-23 at 00:17 +0100, Rick Jones wrote:
> > --On Wednesday, October 22, 2008 13:48:21 -0700 Gilbert Mendoza
> > <gmendoza gmail com> wrote:
> > The CDMA connection does not have the "Send ppp echo
> > ¦ packets" checked... which was explained to me as LCP echo.
> > ¦ 
> > ¦ In the bug report, I also noted a work around, which is to disable
> > LCP
> > ¦ echo requests and interval setting in the global PPP options file:
> > ¦ 
> > ¦ /etc/ppp/options:
> > ¦ 
> > ¦ lcp-echo-interval 0
> > ¦ lcp-echo-failure 0
> 
> So the pppd defaults appear to be to ignore LCP echos.  If the box in
> the connection editor is unchecked, NM will _not_ send lcp-echo-interval
> or lcp-echo-failure to pppd.
> 
> However, if those options were specified in /etc/ppp/options at all, it
> appears that pppd will read that file no matter what, and thus you'll
> get lcp echos turned on even if NM didn't tell pppd to turn them on.
> 
> I will modify NetworkManager to always pass lcp-echo-interval and
> lcp-echo-failure as "0" whenever the box is unchecked in the connection
> editor, to ensure that /etc/ppp/options gets overridden, and that people
> don't get whiplash from stupid pppd config hierarchy...
> 
> > Yes, well spotted! Thanks, I'd forgotten about default ppp options,
> > that tweak works for me too. So the problem is 2-fold:
> > 
> > 1. The "PPP echo" option in the UI is not implemented, and stays off.
> 
> But that should mean that lcp-echo-* aren't passed at all, which is fine
> because most people don't want LCP echo packets.
> 
> > 2. Nothing overrides the default PPP (LCP) echo options, so even
> > though the UI says off, if the default is on, echos are still sent.
> 
> And this is of course the real issue.  Thanks pppd!

lcp-echo-* are always written in svn r4209, including when they are 0.

Dan