Bridging Mesh Networks

[Brian DeLacey]

Hi Anna,
Your reply helps a lot - thanks. Very clear, makes sense, and
understandable!

It's terrific that the plan is to bridge the meshes out into the internet
(or I guess any connected IP LAN/WAN etc.) Perfect!

It sounds like I should now be able to bridge two meshes via MPP - e.g.
mesh1 and mesh2?  Do the IPs need to be the same subnets with different
mesh_ids?

To do this, would I still following the directions in the MPP section, "Add
this new interface and your ethN interface to a new bridge?" I'm just
wondering what I do with ethN since I'm assuming this is all wireless and
ethN seems to be mostly wired with newer cards? Should I really be thinking
about bridging wlan0 and wlan1?

Do I need to have a dedicated bridge PC with two radios, one assigned mesh1
and one for mesh2?  Like this:

Radio card #1 is wlan0; Radio card #2 is wlan1

iw dev wlan0 interface add mesh1 type mp mesh_id mymesh1

iw dev wlan1 interface add mesh2 type mp mesh_id mymesh2

And

mpp$ brctl addbr br0
mpp$ brctl stp br0 off
mpp$ brctl addif br0 mesh1
mpp$ brctl addif br0 mesh2
mpp$ ifconfig mesh1 down
mpp$ ifconfig mesh2 down
mpp$ ifconfig mesh1 0.0.0.0 up
mpp$ ifconfig mesh2 0.0.0.0 up

Then this bridge machine would have its own IP address, something like this:

mpp$ ifconfig br0 192.168.5.1 (Assuming mesh1 is at 192.168.1.1 and mesh 2
is at 192.168.2.1)


If I can get the bridging between meshes going, I will try two webservers
with one in each mesh1/mesh2 crosslinking and testing access across the MPP.

I now have a webserver up and running in my mesh, and the performance across
this small wireless mesh seems really quite good. All the mesh functionality
that is working today is very impressive. This is truly the wireless web!

Brian


On Wed, Feb 18, 2009 at 12:00 PM, <devel-request at lists.open80211s.org>wrote:

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>   1. Re: MPP (Anna Neal)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Tue, 17 Feb 2009 11:27:12 -0800
> From: Anna Neal <anna at cozybit.com>
> Subject: Re: MPP
> To: devel at lists.open80211s.org
> Message-ID:
>        <aa050c750902171127n29433982xb75f3980a6e9ad31 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi Brian,
>
> 2009/2/16 Brian DeLacey <bdelacey at gmail.com>:
> > There was a good thread on MPP back in August. Is that functionality
> working
> > now?
>
> The simple answer here is that the MPP functionality is not fully
> implemented.
>
> > Simple Scenario: I have a mesh and would like to bridge it out to the
> > internet. For instance, I have a mesh with a bunch of IP addresses, but
> none
> > of the machines connected to the internet. I have another machine that is
> > connected to the internet. How to I bridge these two network worlds?
> > I'd like the ability for any one of the mesh machines to be able to
> access
> > the internet by hopping through the mesh. Will it someday be as simple as
> > just starting a browser on a mesh machine and typing in the URL you want
> to
> > access?
>
> That is the plan.
>
> > I followed the MPP directions in http://o11s.org/trac/wiki/HOWTO but
> haven't
> > yet gotten this to work. Is mesh/internet bridging possible?
>
> Yes, but not with the current implementation of o11s.
>
> >Is it expected
> > to be working?
>
> With the current implementation, mesh points will not be able to access the
> Internet and vice versa.
>
> Mesh points can only propagate frames from one MPP to another MPP and
> thusly
> propagating traffic through the mesh.  The mesh points don't know what
> else to do with the information but to forward it in the right direction.
>
> > The Linux How-To on Ethernet Bridging adds steps for setting up
> forwarding /
> > routing / and a default gateway route. Will this get me onto the internet
> > from within a mesh?
>
> Unfortunately, no. More needs to be implemented in o11s to get this
> working.
>
> I hope this helps and make sense.
>
> Thanks,
> Anna Neal
>
>
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