Mac OSX 10.6 server DHCP static address reservations getting ignored

took a bit of mucking about, but i finally got the OSX 10.6 Server to work with DHCP and static reservations the tricks are to enable bootp and to enable dhcp_ignore_client_identifier this is how it should look in your config.

<key>bootp_enabled</key>
<true/>
<key>dhcp_enabled</key>
<array>
<string>en0</string>
</array>
<key>dhcp_ignore_client_identifier</key>
<true/>