Chapter 10 WLAN Screens
ZyWALL 2WG User’s Guide
216
RIP Version
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
.
Multicast
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 Setup
DHCP
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 WLAN, or else the computers
must be manually configured.
IP Pool Starting
Address
This field specifies the first of the contiguous addresses in the IP address pool.
Pool Size
This field specifies the size, or count of the IP address pool.
DHCP Server
Address
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.
DHCP WINS
Server 1, 2
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.
Drop packets that
do not match
static IP or
Dynamic IP/MAC
binding
Select this to allow traffic only from devices on the WLAN which have received an
IP address from the ZyWALL. This is done by allowing traffic only from devices on
the WLAN 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 addresses (and their corresponding MAC addresses).
Exempt packets
in this IP address
range.
Set the ZyWALL to allow packets from the WLAN 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.
Table 50
NETWORK > WLAN (continued)
LABEL
DESCRIPTION
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