MPP with two XOs and a pppd via GPRS

Ricardo Carrano carrano at
Sat Nov 8 08:29:44 EST 2008

Some comments:

- In my tests there was an error related to the module ip_conntrack
that didn't prevent the scheme to work
- Are you sure the dnsmasq is running? (because the mpp script you
using assumes dnsmasq). Run:
chkconfig dnsmasq on (to start at every boot)
service dnsmasq start (for the current boot)
This of course assumes that dnsmasq is installed  (it is in 767). If
not "yum install dnsmasq"
- In your tests you can force the client XO to use the gateway writing
"xo-mpp" in /etc/NetworkManager/mesh-start (that you probably need to


On Fri, Nov 7, 2008 at 6:03 PM, Sameer Verma <sverma at> wrote:
> I have two XOs (XO#1 and XO#2) with build 767. XO#1 is connected using
> wvdial (pppd) over GPRS. I am using Vodafone's service in India. By
> itself, XO#1 gets online. I do have to add the nameserver to
> /etc/resolv.conf but other than that, it works. When I try to set XO#1
> as a MPP using the script from
> I get an error related to iptables the first time. On a second
> attempt, I get no errors and the script seems to do its magic.
> olpc-netstatus reveals that XO#1 is in MPP mode.
> XO#2 cycles through the 3 channels and finally settles at mesh 1 (same
> as the MPP XO#1) but does not say "XO Mesh". XO#2 says "Simple mesh"
> and fails to get online via XO#1. Adding the nameserver t0 XO#2 does
> not help.
> Any pointers?
> Sameer
> --
> Dr. Sameer Verma, Ph.D.
> Associate Professor of Information Systems
> San Francisco State University
> San Francisco CA 94132 USA
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