@Sendy:
Hier staat de uitleg over het linux / windows verhaal:
Keeping the same IP address in multi-boot machines
If you have a PC that can be booted into various different operating systems (e.g. Windows and Linux), you sometimes find that you get allocated different IP addresses in some or all of the systems, but in a consistent way: you usually get one address in Linux, and another in Windows. The disadvantage of this is that the longer you spend in one system, the less likely it is that you will be able to reclaim your normal IP address for the other system: the longer an IP address is idle and unleased, the more likely it is to be allocated to someone else.
The reason for this is that the IP address issued to you by the DHCP server is influenced by a client_id sent in your PC's DHCP request. Windows sends one client_id, and Linux sends another, so the DHCP server allocates different IP addresses even though your MAC address is the same in both cases.
If you can arrange for all your operating systems to send the same client_id, then you would get the same IP address when you boot into any of your systems. The chances of changing the client_id sent by Windows is small, but Linux DHCP clients can be configured to match Windows as follows.
Windows DHCP clients specify a client_id consisting of a type byte of 01 followed by the six-byte MAC address of your PC's ethernet/USB interface.
Some Unix DHCP clients, such as dhclient (from
www.isc.org), allow the client_id to be configured. Others, such as the versions of pump used by many Linux distributions, do not. However, pump-0.8.11 or higher, supplied with RedHat Linux 7.1 and downloadable from
ftp.redhat.com, has a new command-line option --win-client-ident to match the Windows behaviour. Download, build and install the new version, then edit the startup script /etc/sysconfig/network-scripts/ifup to add the --win-client-ident option. Reboot, and your PC should now keep the same IP address when it boots under Linux as when it boots under Windows. [Thanks to John Stark for the multi-boot DHCP information].
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