/etc/ethers.localthe syntax of that file is basically
mine currently looks like this.
These 2 computers will always get the same IP address while any other computer on the network may get a random IP address. After editing this file you need to run
/etc/init.d/luci_ethers startwhich will then generate
/etc/etherswhich is what is actually used. You could also reboot the router but that is unnecessary.
update: it appears this has changed in OpenWRT 10.03 Backfire