Integrator's Manual

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2 = Do not use
3 = Do not use
4 = Fixed
This mode is designed to give you the ability to “hard-code” the IP address of each
COM24 card in your system. This mode gives you the luxury of controlling what IP
addresses are assigned to each card, and works the same way regardless of whether or not a
DHCP server is present.
If you wish to use this mode, you must define a “Base_IP” address. The COM24 cards
will then store this value in memory and use it as the new IP address upon the next reboot.
Be prepared to use extreme caution when using this mode, as you must take care to
account for every IP address in the network and ensure that there are no duplications.
The most widely used implementation for this mode is to simply copy the existing value in
each card‟s “CardIP” field into its “Base_IP” field, then set the mode to Fixed, and reboot
it. This will ensure that the card will always come back up with the IP address currently
assigned to it. You must be careful, however, to ensure that each COM24 card has a
unique IP address. This is especially easy to overlook in installations that contain multiple
COM200 chassis, so it is recommended that you assign each Chassis a unique ID via the
dipswitches on the backplane before proceeding (see Section 4.1 on setting up multiple
chassis).
5 = Do not use
6 = Do not use
7 = Do not use
8 = NoChange
This setting does not actually represent a separate mode, but rather acts as a way to tell the
COM24 card that you would like it to continue using whatever mode it is currently using.
For example, you could use this selection to tell a card that is already using Fixed mode
that you want it to start using a different IP address by selecting this option and entering a
different value into the “Base_IP” field.