User manual

CRADLEPOINT CBA750B | USER MANUAL Firmware version 4.2

Custom Options: Input a custom DHCP option by first clicking the Custom Options field to enable it and then clicking

“Add” at the top of the table that appears. There are close to 200 possible DHCP options available. One of the more

common uses is to assign a VoIP phone server using option 66 (Server name).

• Option: Select an option from the dropdown list or

manually enter the number of an option. A complete list of

options is available from IANA.

• Value: Generally this field should be a string, IP address,

or numeric value. Some fields can accept both IP

addresses and hostnames – in these cases you may need

to wrap this value in quotes. For example, option 66

(Server name) requires quotes around IP addresses.

DHCP Relay: DHCP Relay communicates with a DHCP server

and acts as a proxy for DHCP broadcast messages that must be

routed to remote segments. This is accomplished by converting broadcast DHCP messages to unicast messages to

communicate between clients and servers.

DHCP Server Address: An optional DHCP server address if more than one DHCP server is located on the network. This

field is only available when DHCP Relay is enabled.