Establishing a Mesh Portal: Difference between revisions

Revision as of 21:47, 13 April 2007

It's not entirely automatic quite yet; we'll get a more automatic solution in place soon.

Requirements

A USB ethernet adapter
One OLPC laptop (XO)

What to do

Plug the USB ethernet adapter into the XO

Stop NetworkManager and dhcdbd scripts

chkconfig --level 2345 NetworkManager stop
chkconfig --level 2345 dhcdbd stop

Set your init level to '3'; stopping Sugar and X from starting again.

nano /etc/inittab

find the line with:

id:5:initdefault:

and change the '5' to a '3' so it looks like this instead:

id:3:initdefault:

Create an ifcfg file for your USB wired interface. For example, if your wired interface is eth0, create /etc/sysconfig/network-scripts/ifcfg-eth0, which should contain:

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=dhcp

This file will already exist for 'eth0', but if your USB wired interface is _not_ 'eth0', you need to create this file for whatever interface name your wired USB device is.

Create an ifcfg file for the mesh interface "msh0". Edit /etc/sysconfig/network-scripts/ifcfg-msh0 to look like the following:

#  Marvell mesh network module
DEVICE=msh0
MODE=ad-hoc
CHANNEL=1
ESSID="olpc-mesh-1"
IPADDR=172.18.16.1
NETMASK=255.255.240.0
NETWORK=172.18.16.0
BROADCAST=172.18.31.255
ONBOOT=yes

Install the DHCP daemon

yum -y install dhcp

You may have to try this command twice; yum sometimes runs out of memory doing dependency solving, and terminates before actually installing the RPM.

Configure DHCP to serve on the mesh interface. Edit /etc/sysconfig/dhcpd so it looks like this:

# Command line options here
DHCPDARGS="msh0"

Set up DHCP to provide leases on the mesh interface. Edit /etc/dhcpd.conf to look like the following. For the "option domain-name-servers", use the domain name servers that your USB Ethernet device returned via DHCP, which should be found in /etc/resolv.conf. Don't leave "option domain-name-servers with the "x.x.x.x" values. If you only have one DNS server, omit the second value from at line.

subnet 172.18.16.0 netmask 255.255.240.0 {
	option routers			172.18.16.1;
	option subnet-mask		255.255.240.0;
	option broadcast-address	172.18.31.255;
	range                           172.18.16.2 172.18.31.254;
	option domain-name-servers	x.x.x.x, x.x.x.x;
	default-lease-time	600;
	max-lease-time 		1800;
}

Set DHCP to run on startup

chkconfig --level 345 dhcpd on

reboot

and it should all work

@@ Line 3: / Line 3: @@
 ==Requirements==
-* http://www.cozybit.com/projects/mpp-utils/mpp-utils.tar.gz
 * A USB ethernet adapter
 * One OLPC laptop (XO)
@@ Line 10: / Line 9: @@
 * Plug the USB ethernet adapter into the XO
+* Stop NetworkManager and dhcdbd scripts
-* Un-gzip and un-tar that somewhere on your mesh portal machine
-* in masquerade.sh from the mpp-utils, change EXTIF to your USB wired interface.  If the USB ethernet adapter is plugged in at at boot, this will usually be "eth0".
-* In masquerade.sh, make the following changes (shown here in patch-style form):
-<pre>
-    # This line results in iptables: Unknown error 4294967295
--    #$IPTABLES -A FORWARD -i $EXTIF -o $INTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
-+    $IPTABLES -A FORWARD -i $EXTIF -o $INTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
-    $IPTABLES -A FORWARD -i $EXTIF -o $INTIF  -j ACCEPT
-    $IPTABLES -A FORWARD -i $INTIF -o $EXTIF -j ACCEPT
--    $IPTABLES -A FORWARD -j LOG
-+    #$IPTABLES -A FORWARD -j LOG
-</pre>
-* Stop NetworkManager and the 'network' scripts
 <pre>
 chkconfig --level 2345 NetworkManager stop
-chkconfig --level 2345 network stop
 chkconfig --level 2345 dhcdbd stop
 </pre>
@@ Line 50: / Line 32: @@
 id:3:initdefault:
 </pre>
-* reboot
 * Create an ifcfg file for your USB wired interface.  For example, if your wired interface is eth0, create /etc/sysconfig/network-scripts/ifcfg-eth0, which should contain:
@@ Line 57: / Line 37: @@
 <pre>
 DEVICE=eth0
-ONBOOT=no
+ONBOOT=yes
 BOOTPROTO=dhcp
 </pre>
@@ Line 63: / Line 43: @@
 This file will already exist for 'eth0', but if your USB wired interface is _not_ 'eth0', you need to create this file for whatever interface name your wired USB device is.
+* Create an ifcfg file for the mesh interface "msh0".  Edit /etc/sysconfig/network-scripts/ifcfg-msh0 to look like the following:
-* Start the wired interface
-<pre>ifup eth0</pre>
+<pre>
+#  Marvell mesh network module
+DEVICE=msh0
+MODE=ad-hoc
+CHANNEL=1
+ESSID="olpc-mesh-1"
+IPADDR=172.18.16.1
+NETMASK=255.255.240.0
+NETWORK=172.18.16.0
+BROADCAST=172.18.31.255
+ONBOOT=yes
+</pre>
 * Install the DHCP daemon
@@ Line 78: / Line 70: @@
 <pre>
 # Command line options here
-DHCPDARGS=msh0
+DHCPDARGS="msh0"
 </pre>
@@ Line 84: / Line 76: @@
 <pre>
-subnet 10.0.0.0 netmask 255.255.255.0 {
+subnet 172.18.16.0 netmask 255.255.240.0 {
+	option routers			172.18.16.1;
-  range 10.0.0.5 10.0.0.254;
+	option subnet-mask		255.255.240.0;
-  default-lease-time 3600;
+	option broadcast-address	172.18.31.255;
-  max-lease-time 7200;
+	range                           172.18.16.2 172.18.31.254;
-  option subnet-mask 255.255.255.0;
-  option broadcast-address 10.0.0.255;
+	option domain-name-servers	x.x.x.x, x.x.x.x;
+	default-lease-time	600;
-  option routers 10.0.0.1;
+	max-lease-time 		1800;
-  option domain-name-servers x.x.x.x, x.x.x.x;
 }
 </pre>
@@ Line 100: / Line 92: @@
 </pre>
+* reboot
-* Configure the mesh interface
-<pre>iwconfig msh0 mode ad-hoc channel 11 essid "olpc-mesh"</pre>
-* Assign the address to the mesh interface
-<pre>ifconfig msh0 10.0.0.1 up</pre>
-* run the mpp.py script
-<pre>python mpp.py</pre>
 and it should all work

Establishing a Mesh Portal: Difference between revisions

Revision as of 21:47, 13 April 2007

Contents

Requirements

What to do

Further Reading

Navigation menu

Establishing a Mesh Portal: Difference between revisions

Revision as of 21:47, 13 April 2007

Requirements

What to do

Further Reading

Navigation menu

Search