ZyXEL Communications ZYWALL P1 User Manual page 112

Chapter 6 LAN Screens
Table 24 NETWORK > LAN (continued)
LABEL
RIP Version
Multicast
DHCP Setup
DHCP
IP Pool Starting
Address
Pool Size
DHCP Server
Address
DHCP WINS
Server 1, 2
DNS Servers
Assigned by
DHCP Server
112
DESCRIPTION
The RIP Version field 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 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.
Select IGMP V-1 or IGMP V-2 or None. IGMP (Internet Group Multicast Protocol)
is a network-layer protocol used to establish membership in a Multicast group - it is
not used to carry user data. IGMP version 2 (RFC 2236) is an improvement over
version 1 (RFC 1112) but IGMP version 1 is still in wide use. If you would like to
read more detailed information about interoperability between IGMP version 2 and
version 1, please see sections 4 and 5 of RFC 2236.
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows
individual clients (workstations) to obtain TCP/IP configuration at startup from a
server.
Unless you are instructed by your ISP, leave this field set to Server. When
configured as a server, the ZyWALL provides TCP/IP configuration for the clients.
When set as a server, fill in the IP Pool Starting Address and Pool Size fields.
Select None to stop the ZyWALL from acting as a DHCP server. When you select
None, you must have another DHCP server on your LAN, or else the computers
must be manually configured.
This field specifies the first of the contiguous addresses in the IP address pool.
This field specifies the size, or count of the IP address pool.
Type the IP address of the DHCP server to which you want the ZyWALL to relay
DHCP requests. Use dotted decimal notation. Alternatively, click the right mouse
button to copy and/or paste the IP address.
Type the IP address of the WINS (Windows Internet Naming Service) server that
you want to send to the DHCP clients. The WINS server keeps a mapping table of
the computer names on your network and the IP addresses that they are currently
using.
The ZyWALL passes a DNS (Domain Name System) server IP address (in the
order you specify here) to the DHCP client. The ZyWALL only passes this
information to the LAN DHCP client when you select the DHCP Server check box.
When you clear the DHCP Server check box, DHCP service is disabled and you
must have another DHCP sever on your LAN, or else the computers must have
their DNS server addresses manually configured.
ZyWALL P1 User's Guide