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Chapter 4: Networks
b)
4-22
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Address range to dynamically assign - Optional. Enter range of addresses
that DHCP can assign within a network address space from first to last, such
as 192.168.162.20 to 192.168.162.50.
Leaving this field blank means that DHCP can assign any addresses within
the subnet defined by the IP address and Netmask fields on the Edit
managed interface (eth1) page.
•
Netbios name server - Optional setting. If Microsoft Windows name
resolution is needed, this specifies the IP address of the Windows Internet
Naming Service (WINS) server.
•
DNS domain name - Domain name to be appended if the client uses a client
ID that is not fully qualified. For example, if the client ID is myhost and the
default DNS domain name is widgetsrus.com, then the fully qualified name
becomes myhost.widgetsrus.com.
•
Primary DNS - IP address or fully qualified domain name of the primary DNS
server. Leave this blank to use the system default(s).
•
Secondary DNS - Optional setting. IP address or fully qualified domain name
of the secondary DNS server.
•
Default lease - Maximum time in seconds that an IP address is granted to a
client.
•
Maximum lease - Elapsed time in seconds before the client can request
another lease of an IP address assigned by the DHCP server.
•
Dynamic DNS - Mechanism by which the DNS server learns the assigned IP
address and fully qualified domain name of a wireless client. There are three
options:
-
Ad Hoc - DNS server looks for a valid host name as specified in the
FQDN option and in the client host-name option sent by the client. If this
information is available, the DNS server updates its records with the
client's host name. If not, the server will not have a host name for the
client, and cannot do a DNS update. If there is already a record with the
same host name in the DNS server as submitted by the client, no update
occurs. This prevents spoofing by a client of an existing network server.
Upon expiration of the client's lease or receipt of a DHCPRELEASE
message from the client, the DHCP server removes the client's records
from the DNS database.
-
Interim - Same as Ad Hoc except the client is allowed to communicate
directly with the DNS server to update records. This mode should be
used with care, because there is no mediation or checking of information
supplied by the client.
-
Disabled - No DNS update occurs. Other clients on the network will be
unable to locate this client.
Optional. Configure Advanced DHCP Custom Options for the DHCP server
running on the BSC as follows:
•
Select the predefined DHCP server option you wish to configure from the
Option drop-down menu.
The Name, Code, and Data Type fields are automatically filled for all
predefined DHCP server options.
You can select custom from the Option menu if you wish to define your own
DHCP server option.
•
Optional. If defining your own custom DHCP server option, you must enter a
meaningful name for the option in the Name field, enter the numeric code
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