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User’s Manual Version 1.0
51
Subnet Values
Define your new DHCP subnet here. If you do not wish to specify the
subnet value and subnet mask by hand, you may instead select an
IP interface using the
Get subnet from IP interface
field. A suitable
subnet will be created based on the IP address and subnet mask
belonging to the chosen IP interface.
Subnet value
.
.
.
Subnet mask
.
.
.
Get subnet from IP interface
none
Maximum lease time
86400
seconds
Default lease time
43200
seconds
IP addresses to be available on this subnet
You need to make sure that the start and end addresses offered in
this range are within the subnet you defined above. Alternatively, you
may check the
Use a default range
box to assign a suitable default
IP address pool on this subnet.
Start of address range
.
.
.
End of address range
.
.
.
Use a default range
X5368r-P3
User’s Manual Version 1.0
52
DNS server option information
Enter the addresses of Primary and Secondary DNS servers to be
provided to DHCP clients on this subnet. You may instead allow
DHCP server to specify its own IP address by clicking on the
Use
local host address as DNS server
checkbox.
Existing DHCP Server Subnets
Scroll down to the Existing DHCP Server Subnets section. You will
then see the following information.
Select
DHCP Server
and then click on the
Configure
button.
You will then see the following screen.
Subnet Value / Subnet Mask:
These are the base values for
your new DHCP server subnet. All addresses offered by the
DHCP server have to be located on a particular subnet. Also, if
you wish to define some fixed IP/MAC mappings, each fixed IP
address must have a corresponding subnet. You do not need to
fill in this value if you use the
Get subnet from IP interface
option.
Use local host address as DNS server:
Select
true
or
false
from the drop-down list. If enabled, then the local IP address will
be passed to DHCP clients who request a DNS server address.
For this facility to be useful, you should have the DNS relay
configured to be active, which can then forward DNS queries
