Specifications
ASMi-52 Installation and Operation Manual Appendix B IR-IP Interface Module
Quick Setup Guide B-13
2. Enter addresses for LAN IP, LAN IP Mask, WAN IP, WAN IP mask, default
gateway and DHCP server.
LAN IP Address – The LAN IP address for the IP router LAN interface, is the address to
which nodes connected to the local LAN send packets that are 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 B-6 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.
ASMi-52 with IR-IP
.6.5.4.3192.168.1.2
LAN IP Address: 192.168.1.2
IP Address
.248.248.248.248255.255.255.248
Mask: 255.255.255.248
Mask
192.168.1.1192.168.1.1192.168.1.1192.168.1.1192.168.1.1Default Gateway
Figure B-6. 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 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.