Hello, > Normally, a device tries to get the previous inet number, but sometime this > changes.
DHCP clients can neither request nor suggest a specific IP address, so they don't "try to get" anything. It's just the DHCP server giving out the previous IP to the same client, either by chance or because the existing lease hasn't expired yet. > But I cannot configure the DHCP server myself since this is provided by > my internet provider. Then you're basically out of luck. Since you have few devices and those devices are under your control, just forget about DHCP and configure them statically. andrea
