Monday December 10, 2007 Bill Sommerfeld's Weblog
Still Under Construction. Watch for falling objects
Monday December 10, 2007 configuring dhcp for almost-seamless use of nwam
When I use my laptop at home at my desk, I usually have it plugged in to a port replicator. I have wireless but I need to plug in for power anyway.
I finally got around to setting up the laptop to use the nwam phase 0 package to provide nearly seamless migration between wireless and wired network. The trick turned out to be to set CLIENT_ID in /etc/default/dhcpagent to the client id used by the wired interface -- 0x01 followed by the six-byte ethernet address. I suppose using the wireless interface's mac address would also work, but it's not soldered to the motherboard and might end up migrating to another laptop later..
When I undock to use the laptop in a different part of the house, nwam brings up the wireless and uses the same client ID with the wireless interface, and the DHCP server gives it the same address. There's a brief period of about 4 seconds when bits don't move, but no manual intervention (aside from the physical act of plugging/unplugging) is necessary.
And when I bring the laptop back to my desk and plug it in, the reverse transition is also automatic.
Very slick!
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