40-5
Cisco Router and Security Device Manager 2.5 User’s Guide
OL-4015-12
Chapter40 More About....
DHCP Address Pools
DHCP Address Pools
The IP addresses that the DHCP server assigns are drawn from a common pool
that you configure by specifying the starting IP address in th e range and the
ending address in the range.
The address range that you specify should be within the following private address
ranges:
10.1.1.1 to 10.255.255.255
172.16.1.1 to 172.31.255.255
The address range that you specify must also be in the same subnet as the IP
address of the LAN interface. The range can represent a maximum of 254
addresses. The following examples are valid ranges:
10.1.1.1 to 10.1.1.254 (assuming LAN IP address is in 10.1.1.0 sub net)
172.16.1.1 to 172.16.1.254 (assuming LAN IP address is in 172.16.1.0
subnet)
Cisco SDM configures the router to automatically exclude the LAN interface IP
address in the pool.
An ATM interface without any encapsulation An ADSL interface
A G.SHDSL interface
A tunnel or loopback for either of
the above
A serial interface A Frame Relay connection
A PPP connection
A tunnel interface
A loopback interface
ATM subinterface
An Ethernet subinterface
A dialer interface not associated with an ATM interface
A loopback
A tunnel
A tunnel interface
A loopback interface