I have time machine service started in server app (lion server app ). when i go to time machine preferences on the any client MAC i only see the server as an option for time machine to backup to if the client mac is on the same vlan as the server. is this a contraint on the time machine service or is there something else i have not configured properly. My server is setup with DHCP with manual server assigned IP address. we have about 5 different vlans in our building.