When Does It Make Sense to Change the IP Address?
FRITZ!Box
74
When Does It Make Sense to Change the IP Address?
You should change the IP address of the FRITZ!Box if the fol-
lowing apply to your network:
You have an existing local IP network, one subnet with
several computers.
Fixed IP addresses are registered in the network set-
tings of the computer, and you do not want to or are
not permitted to change these addresses.
You want to connect the FRITZ!Box to the subnet in or-
der to make the FRITZ!Box features available to all of
the computers in the subnet.
What IP Address Must You Assign for the FRITZ!Box and
What Else Must Be Taken into Consideration?
The IP address must come from the address range of
your existing subnet.
The subnet mask must correspond with that of the
connected subnet.
When the DHCP server of the FRITZ!Box is enabled, the
addresses 20 through 200 in the fourth group of nu-
merals of the IP address are reserved for the DHCP
server. If none of the computers in your network has
an address from this pool, the DHCP server can remain
switched on. If one of the computers has a fixed ad-
dress assigned from this pool, you should switch off
the DHCP server.
If you can no longer open the FRITZ!Box user interface
after entering the IP address, see the information in
the section “Errors Opening the User Interface” from
page 80.
F!BoxFonWLAN-7170v2-e.book Seite 74 Freitag, 23. November 2007 3:41 15