== Using UML for ORBIT Node virtualization ==
The goal of this web page is to provide a brief overview 
of how the ORBIT grid could be used to evaluate the performance
of UML based virtualization.

 == Outline ==

1. Load the concerned ORBIT nodes with the image "uml_orbit.ndz" using the 
omf load command.

2. Once the image is loaded, create the desired tun/tap devices using the command 
tunctl
{{{
tunctl -u devname
}}}
3. Setup appropriate IP addresses for the tap interface.

4. Ensure IP forwarding is enabled on the host. This can be done by:
{{{
host# echo 1> /proc/sys/net/ipv4/ip_forward
}}}

5. Also set proxy_arp by:
{{{
host#ech0 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp
}}}

6. Make appropriate changes to the kernel routing table to ensure
packets can be sent to and from the interface.

7. Start the UML instance 

 == Additional Notes ==
Additional information on setting up and using UML is
provided here: http://user-mode-linux.sourceforge.net/