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Section 4 - Appendix B - Application Considerations
OKI OkiLAN 6120e User’s Guide
A name can be arbitrarily assigned to any device on a
network. The following examples use the name
OKIPRINTER. Remember that this name is arbitrary; a
customer can assign any name they wish.
/etc/bootptab: The “/etc/bootptab” file has entries
where each entry maps a network
hardware address to an IP address.
Example: OKIPRINTER:\
ht=ether:\
ha=0040681750A4:\
ip=192.168.42.55
The ht signifies hardware type. For the OkiLAN 6120e,
it will always be ether for an Ethernet device and token
for a Token-Ring device. The ha signifies the network
hardware address. For BOOTP, the network hardware
address must be represented without the colons
between each byte. The ip part of the entry is where the
IP address is specified. There are several other
parameters that can be specified in a bootptab entry.
However, the three parameters shown here are the only
ones required for OkiLAN 6120e installation.
The following sequence of events occurs during the
power up of the OkiLAN 6120e using BOOTP.
1. An OkiLAN 6120e powers up but does not know its
IP address. (It does know its network hardware
address.)
2. The OkiLAN 6120e sends out a BOOTP request
packet with its network hardware address. For this
example, the network hardware address is
00:40:68:17:50:A4.
3. The bootpd daemon running on a BOOTP server
(which in this example is a UNIX workstation) sees
the BOOTP request along with the network
hardware address. It looks up the network hardware
address in the “/etc/bootptab” file. The bootpd
daemon finds the associated IP address of the device
in the bootptab file.