RAD Data comm ASM-60 Manuel D’Utilisation

ASM-60 Installation and Operation Manual 

Appendix C  IR-IP Interface Module 

 

Quick Setup Menu 

C-11 

Used to enter the IP address for the IP router LAN interface. This is the address to 
which nodes connected to the local LAN send packets addressed to the WAN.  

Used to enter the IP subnet mask. The IP router supports a maximum of 254 hosts 
on the LAN, therefore you must use Class C subnet masks. The basic subnet IP 
mask for Class C addresses, which supports the maximum possible number of 

hosts, 254, is 255.255.255.0. To help you understand the selection of IP subnet 
masks, 

 provides a configuration example for a LAN with 6 nodes: the IP 

subnet mask for a 6-node IP network is 255.255.255.248. 

ASM-60 with IR-IP

.6

.5

.4

.3

192.168.1.2

LAN IP Address: 192.168.1.2

IP Address

.248

.248

.248

.248

255.255.255.248

Mask: 255.255.255.248

Mask

192.168.1.1

192.168.1.1

192.168.1.1

192.168.1.1

192.168.1.1

Default Gateway

 

  

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 remain blank, IR-IP operates in the Unnumbered 
Router Mode. 

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

The IP interface module is intended to enable the extension of LANs through the  
ASM-60 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.