Specifications

Installation and Operation Manual Appendix C IR-IP Interface Module
ASMi-31 Ver. 3.0 Performing Preliminary Configuration C-7
1. Temporarily configure the host IP address as 192.168.205.2.
2. The initial destination IP address to be used by the host is 192.168.205.1.
The first step in the preliminary configuration process is to assign the desired IP
address to the LAN interface of the IR-IP interface module.
After an IP address is assigned and saved, you must change the destination IP
address of the Telnet host to the new address, otherwise it is not possible to
continue the configuration process. At the same time, you can also change the
temporary IP address assigned to the host (192.168.205.2) back to its
permanent address.
Assigning the Router LAN Interface Address
The IP address of the IR-IP LAN interface must be configured as part of the
preliminary configuration process. To simplify this process, IR-IP includes a simple
and convenient IP address learning mechanism.
The IP address can be configured and changed at any time, even after the
complete IR-IP configuration process has been performed, because it does not
affect other configuration parameters. Moreover, the IP subnet mask is
automatically adapted to the new IP address.
IP Learning Mechanism
To simplify the configuration process, IR-IP has a special mechanism for
configuring the IP address of its LAN interface. Setting section 1, called IP address
learning, of the IR-IP DIP switch (
Figure C-3 ) to ON enables this mechanism.
The IP learning mechanism enables IR-IP to learn its LAN interface IP address by
receiving frames sent by a
ping utility to the prescribed LAN IP address.
To use the IP learning mechanism, you do not need to know the current address
of IR-IP LAN interface, but only the prescribed IP address.
The IP address is actually retrieved from the ARP frames sent during pinging to
locate the
ping destination, not from the ping frames.
To ensure that the process is correctly performed, it is recommended to check
the contents of the ARP table before starting the
ping utility, to make sure that it
does not contain the address to be assigned to the IP router LAN interface.
 To view and edit the ARP table contents:
If the Telnet host you are using runs under Microsoft Inc. Windows™ 95, 98 or
NT, use the following procedure to view and edit the ARP table contents:
1. Display the table using the arp -a command.
2. If the table includes the intended IP address, remove it from the table using
the arp -d command.
If for some reason the IP learning process does not succeed, before repeating it
make sure to remove the IP address from the table.
Note
Note