Establishing a Mesh Portal: Difference between revisions
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* A USB ethernet adapter |
* A USB ethernet adapter |
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* One OLPC laptop (XO) |
* One OLPC laptop (XO) |
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* The xo-mpp-server RPM |
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==What to do== |
==What to do== |
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* Boot up your XO |
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| ⚫ | |||
* Switch to a virtual terminal (press Ctrl+Alt+F1), and log in as 'root' |
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* |
* Turn off NetworkManager, dhcdbd (the DHCP D-Bus daemon), and avahi |
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<pre> |
<pre> |
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chkconfig --level 2345 NetworkManager |
chkconfig --level 2345 NetworkManager off |
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chkconfig --level 2345 dhcdbd |
chkconfig --level 2345 dhcdbd off |
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chkconfig --level 2345 avahi-daemon off |
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</pre> |
</pre> |
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</pre> |
</pre> |
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* 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: |
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* Reboot; type 'reboot' and press enter |
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<pre> |
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DEVICE=eth0 |
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ONBOOT=yes |
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BOOTPROTO=dhcp |
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</pre> |
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* Wait for the XO to boot to the login prompt, then log in as 'root' |
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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. |
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* Bring up the USB ethernet interface |
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* Create an ifcfg file for the mesh interface "msh0". Edit /etc/sysconfig/network-scripts/ifcfg-msh0 to look like the following: |
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<pre> |
<pre> |
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ifup eth0 |
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# Marvell mesh network module |
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DEVICE=msh0 |
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MODE=ad-hoc |
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CHANNEL=1 |
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ESSID="olpc-mesh-1" |
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IPADDR=172.18.16.1 |
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NETMASK=255.255.240.0 |
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NETWORK=172.18.16.0 |
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BROADCAST=172.18.31.255 |
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ONBOOT=yes |
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</pre> |
</pre> |
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<pre> |
<pre> |
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yum -y install dhcp |
yum -y install dhcp xo-mpp-server |
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</pre> |
</pre> |
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You may have to try this command twice; yum sometimes runs out of memory doing dependency solving, and terminates before actually installing the RPM. |
You may have to try this command twice; yum sometimes runs out of memory doing dependency solving, and terminates before actually installing the RPM. |
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* Turn on various services at startup |
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* Configure DHCP to serve on the mesh interface. Edit /etc/sysconfig/dhcpd so it looks like this: |
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<pre> |
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# Command line options here |
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DHCPDARGS="msh0" |
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</pre> |
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* 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. |
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<pre> |
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subnet 172.18.16.0 netmask 255.255.240.0 { |
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option routers 172.18.16.1; |
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option subnet-mask 255.255.240.0; |
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option broadcast-address 172.18.31.255; |
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range 172.18.16.2 172.18.31.254; |
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option domain-name-servers x.x.x.x, x.x.x.x; |
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default-lease-time 600; |
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max-lease-time 1800; |
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} |
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</pre> |
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* Set DHCP to run on startup |
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<pre> |
<pre> |
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chkconfig --level 2345 network on |
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chkconfig --level 345 iptables on |
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chkconfig --level 345 dhcpd on |
chkconfig --level 345 dhcpd on |
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chkconfig --level 345 mpp on |
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</pre> |
</pre> |
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* reboot |
* Reboot; type 'reboot' and press enter |
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and it should all work |
and it should all work |
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Revision as of 22:15, 14 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)
- The xo-mpp-server RPM
What to do
- Boot up your XO
- Switch to a virtual terminal (press Ctrl+Alt+F1), and log in as 'root'
- Turn off NetworkManager, dhcdbd (the DHCP D-Bus daemon), and avahi
chkconfig --level 2345 NetworkManager off chkconfig --level 2345 dhcdbd off chkconfig --level 2345 avahi-daemon off
- 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:
- Plug the USB ethernet adapter into the XO
- Reboot; type 'reboot' and press enter
- Wait for the XO to boot to the login prompt, then log in as 'root'
- Bring up the USB ethernet interface
ifup eth0
- Install the DHCP daemon
yum -y install dhcp xo-mpp-server
You may have to try this command twice; yum sometimes runs out of memory doing dependency solving, and terminates before actually installing the RPM.
- Turn on various services at startup
chkconfig --level 2345 network on chkconfig --level 345 iptables on chkconfig --level 345 dhcpd on chkconfig --level 345 mpp on
- Reboot; type 'reboot' and press enter
and it should all work
Further Reading
More information is available on these topics: