[Olsr-users] [Babel-users] Mesh Network

[Henning Rogge]

Hi,

I am crossposting this to olsr-users because my answer should be
generic enough for both OLSR and Babel... and the mail I am responding
to contains much more information than the one we received on the
olsr-users list.

You need four basic things for routing between the clients attached to
the access points of your mesh.

A) routing between the mesh routers itself (I think you got this covered)
B) routing from the mesh routers to the IPs of the attached access
points (You got that covered by setting the network mask on the AP
interface)
C) routing of mesh routers for the prefix of an AP towards the mesh
router the AP is attached to.
D) routing of traffic for mesh routers and attached APs from a client
connected to an AP to the local mesh router.

C is done by telling the routing protocol that your local mesh node is
responsible for more prefixes. In olsrd you have to set the prefix as
a "HNA" (Host Network Association), in Babel you have to tell Babel to
export the routes of the AP interface I think (Someone here on the
list can tell you all the details).

D is most times done by setting up a DHCP on the mesh router for the
AP interface that distributes a default route back towards the router.

So check:
- can I ping between two different mesh routers?
- can I ping between the mesh router and a local AP client?
- can I ping an AP client from a different mesh router?
- can I ping between two AP clients attached to different mesh routers?

Henning Rogge

On Wed, Mar 25, 2015 at 4:27 AM, Sahana k.srinivas
<(spam-protected)> wrote:
> Hi,
>
>
> Thank you for your response! :)
>
> Outback Dingo : Here is The problem with details
> Three routers r1 r2 r3 with ad-hoc and Access point are configured on wlan0
> interface running on 2.4GHz
> The configuration
> router r1
> adhoc mode : ssid "mesh"
>                          ip: 192.168.1.1
>                          subnet:255.255.255.0
> access point: ssid  C1
>                         ip 192.168.2.1
>                         subnet 255.255.255.0
> router r2
> adhoc mode : ssid "mesh"
>                          ip: 192.168.1.45
>                          subnet:255.255.255.0
> access point: ssid  C2
>                         ip 192.168.2.45
>                         subnet 255.255.255.0
> router r1
> adhoc mode : ssid "mesh"
>                          ip: 192.168.1.75
>                          subnet:255.255.255.0
> access point: ssid  C1
>                         ip 192.168.2.75
>                         subnet 255.255.255.0
>
> Im running Babel on three routers on wlan0 interface. I have disabled
> firewall as of now. when laptop(not running babel) connects to R1 it cannot
> access the routing table of babel i.e it cannot communicate with R2 and R3
> also.
> So could you please help me with this problem.And we want to do it without
> having to install Babel on the clients! Because it wouldn't be feasible for
> all the clients in our network to run Babel if they need to communicate with
> other clients.
>
>
>
> Juliusz Chroboczek : Yeah!! I realized that as soon as i sent the mail. And
> immediately sent the corrections in the next mail!! :) Thank you :)
>
>
> Henning Rogge : Yeah! one of my TeamMate sent the same mail on OLSR group.
> Its because we are trying to implement three routing protocols on our
> network and doing a comparative analysis of them as to which one suits best
> for the topology considered.
> We are stuck up with the client-to-client communication in all the three..
> so trying to get help in all forums :) :)
>
>
>
> Regards,
> Sahana
>
>
>
> On Tue, Mar 24, 2015 at 3:40 PM, Henning Rogge <(spam-protected)> wrote:
>>
>> We got the same mail on olsr-users ~ 23 hours ago.
>>
>> Henning Rogge
>>
>> On Tue, Mar 24, 2015 at 10:36 AM, Juliusz Chroboczek
>> <(spam-protected)> wrote:
>> > Dear Sahana,
>> >
>> >> The router is running OLSRD on wireless interface (wlan0).
>> >
>> > The olsrd mailing list is at <(spam-protected)>.  They're
>> > a friendly bunch, please ask there.
>> >
>> > This list is for the Babel routing protocol, which is somewhat similar
>> > to
>> > OLSR but completely different ;-)
>> >
>> > -- Juliusz
>> >
>> > _______________________________________________
>> > Babel-users mailing list
>> > (spam-protected)
>> > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/babel-users
>
>