✎ daves_mesh_network_experiments [the libarynth]

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==== Daves Mesh Network Experiments ====

Various records of networking experiments

=== Setting up dhcp server ===

Used for example to ssh into a raspberry pi or beagleboard from a laptop with no router present.

apt-get install isc-dhcp-server

Create /etc/dhcp/dhcpd.conf:

ddns-update-style none;
  option domain-name "example.org";
  option domain-name-servers ns1.example.org, ns2.example.org;
  default-lease-time 600;
  max-lease-time 7200;

authoritative;

subnet 192.168.0.0 netmask 255.255.255.0 {
          ## dhcp start  and end IP range ##
          range 192.168.0.100 192.168.0.200;
          option subnet-mask 255.255.255.0;     ## subnet
          option broadcast-address 192.168.0.255; ## broadcast
          option routers 192.168.0.1; ## router IP
  
          host eth0 {
                  hardware ethernet 70:5A:B6:0B:1C:67;
                  fixed-address 192.168.0.1;
          }
  
  }

sudo service isc-dhcp-server start

Set ip address of machine to fixed:

sudo ifconfig eth0 192.168.0.1

Also sanity check ip addresses via:
  
  route -n

Plug in cables, and scan:

sudo arp-scan --interface=eth0 192.168.0.0/24

=== Running an ad-hoc wireless network on the raspberry pi ===

ifconfig wlan0 down
  iwconfig  wlan0 channel 4
  iwconfig  wlan0 mode ad-hoc
  iwconfig  wlan0 essid 'raspberry pi ad-hoc'
  iwconfig  wlan0 key password
  ifconfig  wlan0 192.168.2.1

[[https://github.com/jech/babeld]]

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