Chapter 6 LAN Screens
ZyWALL 2WG User’s Guide
147
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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.
MAC Address
Every Ethernet device has a unique MAC (Media Access Control) address. The MAC address
is assigned at the factory and consists of six pairs of hexadecimal characters, for example,
00:A0:C5:00:00:02.
DHCP
The ZyWALL can use DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC
2132) to automatically assign IP addresses subnet masks, gateways, and some network
information like the IP addresses of DNS servers to the computers on your LAN. You can
alternatively have the ZyWALL relay DHCP information from another DHCP server. If you
disable the ZyWALL’s DHCP service, you must have another DHCP server on your LAN, or
else the computers must be manually configured.
IP Pool Setup
The ZyWALL is pre-configured with a pool of IP addresses for the computers on your LAN.
See
for the default IP pool range. Do not assign your LAN computers
static IP addresses that are in the DHCP pool.
RIP Setup
RIP (Routing Information Protocol, RFC 1058 and RFC 1389) allows a router to exchange
routing information with other routers.
RIP Direction
controls the sending and receiving of
RIP packets. When set to
Both
or
Out Only
, the ZyWALL 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.
RIP Version
controls the format and the broadcasting method of the RIP packets that the
ZyWALL 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
send 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
RIP Version
to
RIP-1
.