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Appendix B IR-IP Interface Module Installation and Operation Manual
B-12 Quick Setup Guide ASMi-52 Ver. 2.5
WAN IP Address – Used to enter the IP address for the IR-IP WAN interface, i.e., the IP
address to be used by IP hosts on the WAN to reach this IR-IP interface
module.
If the WAN IP Address field remains blank, IR-IP operates in the
Unnumbered Router Mode.
WAN IP Mask – Used to enter the IP subnet mask for the WAN interface.
Default Gateway:
Operation without Default Gateway
The IP interface module is intended to enable the extension of LANs
through the
ASMi-52 link. Therefore, its default routing operation is different from the
default routing operation of standard IP routers:
IR-IP forwards packets with destinations not located on the local LAN
through the WAN interface
Packets received from the WAN interface and destined to hosts
located on the local LAN are forwarded to the LAN; other packets are
discarded.
The default operation is used when the Default Gateway field is blank.
Operation with Default Gateway
You can instruct IR-IP to send packets with destinations not located on the
local LAN to a specific router, which is called the default gateway. The
default gateway must be connected to the local LAN.
To use this option, enter the IP address of another router attached to the
local LAN in the Default Gateway field.
It is very important to obtain the correct parameters from the system administrator
or ISP. The most common problem when establishing an IP connection is incorrect
configuration of IP parameters and default gateway. Do not try to guess these
parameters.
DHCP Relay – IR-IP can operate as a DHCP relay for computers on its LAN. In this
mode, the user does not need to configure the IP addresses and other
related parameters for the PCs on the LAN: they receive the configuration
from the DHCP server via the IR-IP module.
Note