Reboot of DHCP-Server results in a mess of Client-IP-Addresses

in my network开发者_C百科 at home, driving some ubuntu-pc's one of them is dhcp-server running dhcp3-server. If i reboot this pc all the clients are going offline with a ahavi-ip-address (169.254...). what is going on during the short downtime of the dhcp-server, what is wrong on which side: client or server?

Peace Ice

Have a look at the lease time concepts of DHCP server.

Whenever I restarted the DHCP server, I never expect client to behave nicely.

well when ever you are running DHCP server you have to disable DHCP in your router. if you do not do this it will overtake your DHCP box. this strange IPs comes form there.