Maxe and others,
I have been wondering this as well. We have set up a small network of
nodes on some ALIX boards and would like one of them to act as a
backhaul to the internet.
What's working for us is this: On the backhaul node, we can connect to
the internet via the ethernet port. One of the wireless cards on our
node is up and connected to our mesh with our assigned mesh ip subnet.
In order to direct traffic from other nodes to the internet, we had to
do some ip masquerading on the backhaul node, and physically set the
default gateway on all the other nodes to point to the backhaul node.
Specifically, on the backhaul node:
iptables -t nat -A POSTROUTING ! -d 10.1.0.0/16 -j MASQUERADE
(10.1.0.0/16 is our mesh subnet) then
sysctl net.ipv4.ip_forward=1
On all the other nodes connected to the mesh, we have to do
route add default gw {ip address of backhaul node that has internet
connection}
In that manner, we can ping the internet (assuming we can ping the
internet from our backhaul node) from any other node connected to the
mesh network.
However, this is not the instructions given in the HOWTO, and am still
pretty confused on configuring the nodes, ie setting the parameters
|iw mesh set mesh_param mesh_hwmp_rootmode=1
iw mesh set mesh_param mesh_gate_announcements=1
||
|
The part I don't understand is even if the "mesh gate" announces that it
has an external connection, the other nodes on the mesh network don't
update their routing tables. So pinging any external address can't happen.
Also related to the above, the HOWTO instructs the user to bridge a mesh
interface with an ethernet interface (for example) and assign the bridge
a mesh ip. So, I guess, in order to connect to an external network,
your mesh network has to be in the same subnet as the external network.
That is, if your DHCP server is 192.168.112.129, your mesh has to be in
the 192.168.0.0/16 subnet. Right?
I'm pretty new to the whole mesh networking thing, but I hope this post
helps Maxe "jimmy-rig" a mesh to connect to the internet, and also gets
some attention and some answers on this topic, as I'm pretty sure I'm
misunderstanding what above mentioned mesh_param's should do.
-Justyn
On 05/04/2012 03:03 AM, maxe wifi wrote:
Dear All,
Can anyone help me in 802.11s mesh internet connectivity.
Thanks
Maxe
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