opsi Version 3.3.1 - opsi Download - uib

6. opsi-Module: depot server
The other configuration data is located in the file '/etc/dhcp3/dhcpd.conf'. This file can
be edited (in addition to the common unix/linux editors) web based with the gui-tool
webmin(web based interface for system administration for Unix ).
Basically there are three ways of IP address allocation on DHCP-Servers:
Dynamically: From within a certain range of IP addresses vacant addresses are
assigned to a client for a certain amount of time. At expiration – even during a
working-session – the client has to try to extend this assignment, but eventually
the client gets a new IP address. In this way the same IP address can be used at
different times by different clients.
Automatically: An unused IP address is assigned to each client automatically for
an unlimited time.
Manually: The assignment of the IP addresses is configured by the system
administrators manually. At a DHCP-request this address is assigned to the
client. For the opsi depot server this method is recommended, since this
simplifies the network administration.
PCs with a static IP address can use both protocols DHCP/PXE or BOOTP (depends on
the network controller's bootprom).
A dynamic or automatic IP address assignment can only be realized with DHCP and
PXE bootproms.
BOOTP (Bootstrap Protocol) only supports static assignment of MAC and IP
addresses, like the manual assignment with DHCP.
There are only 2 types of data packets with BOOTP: BOOTREQUEST (Client-
Broadcast to Server = request for IP address and boot parameters to a server ) and
BOOTREPLY (Server to Client: advise of IP address and boot parameters).
At the start of the network connection the only information a network controller has got
is its own hardware address (= hardware ethernet, MAC of the NIC), consisting of six
two-digit hexadecimal numbers.
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