Mesh networking on OpenWRT 15.05 with OLSR

DOCUMENT UNDER CONSTRUCTION.

Preliminaries

Access with command like via ssh is required. Use Putty or any other terminal.

Software

OpenWRT 15.05 Chaos Calmer is installed with defaults. Target device as 8Mb Flash Memory Minimum.

Hardware

Note concerning the WR703N router. This must be modified with upgraded flash memory. The default unit does not have sufficient memory.

This will work on EmonWRT3 and ModWRT devices.

Setup a Node

This is for setting up a simple node that has no access to the outside but can connect to other nodes. Most unit in the network will have this configuration.

We will use here

• Wired - Static IP 192.168.2.1 (for configuration access only)
• Wifi - Ad-hoc wifi with Static IP 10.10.10.xx (for comms with other nodes).

-1- Install packages

Install the required packages with the command below:

opkg update

opkg install luci-app-olsr luci-app-olsr-services luci-app-olsr-viz luci-lib-json
opkg install olsrd olsrd-mod-arprefresh olsrd-mod-bmf olsrd-mod-dot-draw olsrd-mod-dyn-gw olsrd-mod-dyn-gw-plain olsrd-mod-httpinfo olsrd-mod-mdns 
opkg install olsrd-mod-nameservice olsrd-mod-p2pd olsrd-mod-pgraph olsrd-mod-secure olsrd-mod-txtinfo olsrd-mod-watchdog olsrd-mod-quagga
opkg install wireless-tools

-2- Setup Wired LAN

Make sure the wired interface LAN is setup with static IP address. For our example we will use 192.168.2.1 (if you opt for another ip address then avoid the internet access subnet - like 192.168.1.0 for home routers.)

Make sure the interface is not bridging the wifi.

• In Network | Interfaces click on Edit on the LAN interfaces. Then in Physical Settings untick create a bridge over specified interface(s).
• Make sure Ethernet Adapter: "eth0" (lan) is ticked on.

You should now configure this unit by connecting a computer directly to this node with an ethernet cable.

The Lan interface should look like this below.

-3- Setup wifi mesh interface

In Network | Wifi click on Edit on the only wifi interface that should be there.
Down the page setup the following:
ESSID: OLSR
Mode: Ad-Hoc
Network: tick create and enter 'mesh'

click

The wifi interface should look like this below:

In Network | Wifi click on Edit on the interface MESH.
Setup these parameters below:
Protocol: Static address
(click the Switch Protocol button now). IPv4 address: 10.10.10.2
Set IPv4 address above as 10.10.10.x with x being the number of your node. 2 in our example here.
IPv4 netmask: 255.255.255.0

Go to Firewall Settings tab Tick on unspecified -or- create: and enter 'mesh' click

Go to Network| Firewall

Wifi Encryption

opkg remove wpad-mini
opkg update
opkg install wpad authsae