DHCP IP addresses conflicting
My Mac continuously get this error:
Another device on the network is using your computer’s IP address (10.0.0.21).
It happens before I added a MAC-IP address reflection rule. There is no another device applying for the IP address of 10.0.0.21, but my Mac cannot get IP from my ISC-DHCP server.
It also happens after I combine my Mac's MAC to the IP address of 10.0.0.21.
To restart the ISC-DHCP-server service is of no use. The only way to solve this issue is to restart the whole server.
Update on Oct 24
The Mac's system log says the dhcpd server takes the IP address for which the Mac is trying to get.