RAD Data comm RIC-E1 LAN IP Address, LAN IP Mask, WAN IP Address, WAN IP Mask, Default Gateway

Appendix D IR-IP Interface Module RIC-E1Installation and Operation Manual

LAN IP Address

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.

LAN IP Mask

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, Figure D-9provides a configuration example for a LAN with 6 nodes: the IP subnet mask for a 6-node IP network is 255.255.255.248.

RIC-E1 with IR-IP

LAN IP Address: 192.168.1.2

Mask: 255.255.255.248

IP Address	192.168.1.2	.3	.4	.5	.6
Mask	255.255.255.248	.248	.248	.248	.248
Default Gateway	192.168.1.1	192.168.1.1	192.168.1.1	192.168.1.1	192.168.1.1

Figure D-9. Selecting the IP Subnet Mask

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 remain 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 RIC-E1 E1 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.

D-14 Quick Setup Menu

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