Filter
Top Products
Dynamic Host Configuration Protocol (DHCP)
24
4
Dynamic Host Configuration Protocol
(DHCP)
The Dynamic Host Configuration Protocol (DHCP) provides a mechanism for
delivering IP configuration parameters, including IP address, Subnet mask and
default gateway, to devices (hosts) on an IP network. A DHCP server manages
the pool of available IP addresses and grants device requests for an IP address.
At power-up, the NIB broadcasts a DHCP request for an IP address. If a DHCP
server is present the request will be processed, and an IP address will be re-
turned to the NIB. Upon receipt of the IP address, the NIB resets, and prints a
network status page. The network status page will list the new IP address (and
Subnet mask and default gateway). Once an IP address has been assigned to the
NIB; it will no longer broadcast DHCP requests.
Important
❒
NIB IP address assignment with DHCP will only work when the NIB does not
have an existing IP address.
The DHCP server may grant a temporary IP address, called a temporary lease or
temporary reservation, which expires after a period, or may grant a permanent
or unlimited lease or reservation which does not expire.
Devices that are granted a temporary lease will be notified before the lease ex-
pires and asked if they would like to extend the lease. The NIB will continue ex-
tending its lease indefinitely (unless prohibited by your DHCP server
configuration) and thus maintain a consistent IP address.
Important
❒
If the NIB is not turned on or is not connected to the network during the pe-
riod when the DHCP server is sending requests to extend the lease, the lease
will not be extended. The DHCP server will cancel the lease and may assign
the IP address to another device. Therefore, it is highly recommended to ex-
plicitly specify the NIB lease as permanent or unlimited in your DHCP server
configuration.
If you prefer not to use DHCP for IP address assignment, it may be disabled with
the MAP utility or by connecting to the NIB address with a browser. The en-
able/disable DHCP setting may be found in the Setup TCP/IP section under the
Protocols heading.