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22
IO
LAN +
- User and Administration Guide
Connecting via
BOOTP (for Unix
systems only)
IOLAN+ supports BOOTP which allows the communications
server to dynamically configure itself on startup. Upon
startup IOLAN+ sends four BOOTP broadcast requests if it
has no IP address. This broadcast request packet contains
the Ethernet address of your unit.
The request is received by all hosts on the network and is
checked against a file to find a match. This data base file will
normally be
/etc/bootptab and will be of the following format:
# bootptab description
:ht=ethernet:ha=0080d400024e:\
:hd=\
:bf=\
:ip=204.17.209.8:
Where:
ht
is the type of network
ha
is the Ethernet address on back of IOLAN+
hd
is the home directory for specifying IOLAN+ firmware (optional)
bf
is the name of IOLAN+ firmware (optional)
ip
is the IP address you want to use
Note: This BOOTP implementation is a subset and not a full
implementation of the RFC.
Note: The most common error is bad information in the
/etc/bootptab file (recheck it). See Troubleshooting &
Maintenance (Appendix B) for more information.
You can now move back to
The Menu System in this chapter.
Saving and
Downloading
Configurations
It is possible to save the configuration of your IOLAN+. This
is convenient for loading multiple communications servers
with the same setup. It is also advisable as a backup method.
If the boot file name has the extension “.cf” (eg
iolan.cf), it
will be loaded as a configuration file rather than a boot file.
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