RAD Data comm ASMi-52 Manuel D’Utilisation

Appendix B  IR-IP Interface Module 

Installation and Operation Manual 

B-12 

Quick Setup Guide 

ASMi-52 Ver. 2.5 

 – 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. 

 – Used to enter the IP subnet mask for the WAN interface. 

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. 

 

 

 –   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.