ZyXEL Communications ZyXEL ExpWave 240B - Manual (Page 45)

ExpWave 240B Secure Outdoor Ethernet Radio Link
Wireless Setup 5-3
The subnet mask specifies the network number portion of an IP address. Your ExpWave will compute the subnet
mask automatically based on the IP address that you entered. You don’t need to change the subnet mask computed
by the ExpWave unless you are instructed to do otherwise.
Private IP Addresses
Every computer on the Internet must have a unique IP address. If your networks are isolated from the Internet, for
example, only between your two branch offices, you can assign any IP addresses to the hosts without problems.
However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP addresses
specifically for private networks:
Table 5-2 Private IP Address Ranges
10.0.0.0 — 10.255.255.255
172.16.0.0 — 172.31.255.255
192.168.0.0 — 192.168.255.255
You can obtain your IP address from the IANA, from an ISP or have it assigned by a private network. If you belong to
a small organization and your Internet access is through an ISP, the ISP can provide you with the Internet addresses
for your local networks. On the other hand, if you are part of a much larger organization, you should consult your
network administrator for the appropriate IP addresses.
Regardless of your particular situation, do not create an arbitrary IP address; always follow the guidelines
above. For more information on address assignment, please refer to RFC 1597, Address Allocation for
Private Internets and RFC 1466, Guidelines for Management of IP Address Space.
5.3.4 RIP Setup
RIP (Routing Information Protocol, RFC1058 and RFC 1389) allows a router to exchange routing information with
other routers. The RIP Direction field controls the sending and receiving of RIP packets. When set to Both or Out
Only, the ExpWave will broadcast its routing table periodically. When set to Both or In Only, it will incorporate the
RIP information that it receives; when set to None, it will not send any RIP packets and will ignore any RIP packets
received.
The Version field controls the format and the broadcasting method of the RIP packets that the ExpWave sends (it
recognizes both formats when receiving). RIP-1 is universally supported; but RIP-2 carries more information. RIP-1 is
probably adequate for most networks, unless you have an unusual network topology.
Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the difference being that RIP-2B uses subnet
broadcasting while RIP-2M uses multicasting. Multicasting can reduce the load on non-router machines since they
generally do not listen to the RIP multicast address and so will not receive the RIP packets. However, if one router
uses multicasting, then all routers on your network must use multicasting, also.
By default, RIP Direction is set to Both and the Version set to RIP-1.
5.4 LAN Setup Menu
From the main menu, enter 3 to open Menu 3 - LAN Setup to configure TCP/IP (RFC 1155) and DHCP Ethernet
setup.