RAD Data comm ASMi-52 manual Parameters, Operation without Default Gateway

Appendix B IR-IP Interface Module		Installation and Operation Manual
	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.
		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.

DHCP Relay – 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.

B-12 Quick Setup Guide ASMi-52 Ver. 2.5