ZyXEL Communications ZYWALL 2 PLUS User Manual page 157

Table 37 NETWORK > WAN > Dial Backup (continued)
LABEL
Primary/ Secondary
Phone Number
Dial Backup Port
Speed
AT Command Initial
String
Advanced Modem
Setup
TCP/IP Options
Get IP Address
Automatically from
Remote Server
Used Fixed IP
Address
My WAN IP
Address
Remote IP Subnet
Mask
Remote Node IP
Address
Enable NAT
(Network Address
Translation)
Enable RIP
RIP Version
ZyWALL 2 Plus User's Guide
DESCRIPTION
Type the first (primary) phone number from the ISP for this remote node. If the
Primary Phone number is busy or does not answer, your ZyWALL dials the
Secondary Phone number if available. Some areas require dialing the pound
sign # before the phone number for local calls. Include a # symbol at the
beginning of the phone numbers as required.
Use the drop-down list box to select the speed of the connection between the
Dial Backup port and the external device. Available speeds are: 9600, 19200,
38400, 57600, 115200 or 230400 bps.
Type the AT command string to initialize the WAN device. Consult the manual of
your WAN device connected to your Dial Backup port for specific AT commands.
Click Edit to display the Advanced Setup screen and edit the details of your dial
backup setup.
Type the login name assigned by your ISP for this remote node.
Select this check box if your ISP assigned you a fixed IP address, then enter the
IP address in the following field.
Leave the field set to 0.0.0.0 (default) to have the ISP or other remote router
dynamically (automatically) assign your WAN IP address if you do not know it.
Type your WAN IP address here if you know it (static). This is the address
assigned to your local ZyWALL, not the remote router.
Leave this field set to 0.0.0.0 (default) to have the ISP or other remote router
dynamically send its subnet mask if you do not know it. Type the remote
gateway's subnet mask here if you know it (static).
Leave this field set to 0.0.0.0 (default) to have the ISP or other remote router
dynamically (automatically) send its IP address if you do not know it. Type the
remote gateway's IP address here if you know it (static).
Network Address Translation (NAT) allows the translation of an Internet protocol
address used within one network to a different IP address known within another
network.
Select the check box to enable NAT. Clear the check box to disable NAT so the
ZyWALL does not perform any NAT mapping for the dial backup connection.
Select this check box to turn on RIP (Routing Information Protocol), which allows
a router to exchange routing information with other routers.
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).
Choose RIP-1, RIP-2B or RIP-2M.
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.
Chapter 8 WAN Screens
157