ZyXEL Communications 5 Series User Manual page 154

Chapter 7 LAN Screens
Table 27 NETWORK > LAN (continued)
LABEL
RIP Version
Multicast
DHCP Setup
DHCP
IP Pool Starting
Address
Pool Size
DHCP Server
Address
DHCP WINS
Server 1, 2
Filter (IP/MAC
Binding
Drop packets that
do not match
static IP or
Dynamic IP/MAC
binding
Exempt packets
in this IP address
range.
154
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 Management
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 Relay to have the ZyWALL forward DHCP requests to another DHCP
server. When set to Relay, fill in the DHCP Server Address field.
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.
Select this to allow traffic only from devices on the LAN which have received an IP
address from the ZyWALL. This is done by allowing traffic only from devices on the
LAN with specific combinations of IP and MAC addresses. These IP addresses are
dynamically assigned by the ZyWALL or manually set using static DHCP.
See the Static DHCP screen for a list of static IP/MAC address combinations. See
the DHCP Table available from the Home screen for a list of dynamically assigned
IP (and their corresponding MAC addresses).
Set the ZyWALL to allow packets from the LAN with source IP addresses within a
specified range. This allows packets even when their IP and MAC addresses do
not match those specified in the Static DHCP screen or DHCP Table.
Type this range of IP addresses in the From and To fields.
ZyWALL 5/35/70 Series User's Guide