Appendix E - IR-IP Interface Module HCD-E1
Installation & Operation Manual
E-12 Quick Setup Menu
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 HCD-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.
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.
Note
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.

Read Protocol

from DIP

Switches

Selecting YES for this parameter forces IR-IP router card to use the WAN
protocol selected by section 2 of its DIP switch: PPP or Frame Relay.
Protocol Used to select the WAN protocol to be used by the IP router card: PPP,
HDLC or Frame Relay.
This parameter is available only if the Read Protocol from DIP Switches
parameter is set to NO.