Fritz! Box 7560 Configuration And Operation page 116

Network Settings in the FRITZ!Box
Subnetworks
The FRITZ!Box also supports subnets that are not pure class
A, B, or C networks. This means you can enter any subnet
mask you like. The smallest subnet mask allowed is
255.255.255.252.
IPv4 Address in Case of Emergency
The FRITZ!Box has a fixed IPv4 address that cannot be
changed. The FRITZ!Box always can be reached at this IPv4
address.
Emergency IPv4 address
For instructions about how to handle the emergency IPv4 ad-
dress, see the section
Emergency IP Address
DHCP Server for IPv4
The FRITZ!Box has a DHCP server for the IPv4 range. The DHCP
server is enabled by default in the factory settings. The fol-
lowing range of IP addresses is reserved for the DHCP server
in the factory settings:
IP address range reserved upon
delivery
How the DHCP Server Works
Every time a network device connected with the FRITZ!Box is
started, the DHCP server assigns it an IPv4 address from the
IP address range of the DHCP server.
Only one DHCP server may be active within any network.
Assigning the IP addresses via the DHCP server ensures that
all of the network devices connected with the FRITZ!Box are
located in the same IP network.
The IPv4 settings of the network devices must have the "Ob-
tain an IP address automatically" option enabled. This is the
only way to receive the IP address from the DHCP server. For
more information, see the chapter
FRITZ!Box 7560
169.254.1.1
Opening the User Interface Using an
from page 162.
192.168.178.20 –
192.168.178.200
Obtaining an IP Address
116