ZyXEL Communications 802.11g ADSL 2+ 4-Port Security Gateway HW-D Series - Manual (Page 104)

P-662H/HW-D Series User’s Guide
104 Chapter 5 WAN Setup
Advanced
Modem Setup
Click the Edit button to display the Advanced Modem Setup screen and edit the
details of your dial backup setup.
TCP/IP Options
Metric This field sets this route's priority among the three routes the ZyXEL Device uses
(normal, traffic redirect and dial backup). Type a number (1 to 15) to set the priority
of the dial backup route for data transmission. The smaller the number, the higher
the priority.
If the three routes have the same metrics, the priority of the routes is as follows:
WAN, Traffic Redirect, Dial Backup.
Enable SUA 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.
SUA (Single User Account) is a subset of NAT that supports two types of mapping:
Many-to-One and Server.
Enable RIP Select this check box to turn on RIP (Routing Information Protocol), which allows a
router to exchange routing information with other routers.
RIP Version The RIP Version field controls the format and the broadcasting method of the RIP
packets that the ZyXEL Device 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.
RIP Direction RIP (Routing Information Protocol) allows a router to exchange routing information
with other routers. The RIP Direction field controls the sending and receiving of RIP
packets.
Choose Both, In Only or Out Only.
When set to Both or Out Only, the ZyXEL Device will broadcast its routing table
periodically.
When set to Both or In Only, the ZyXEL Device will incorporate RIP information
that it receives.
Enable Multicast Select this check box to turn on IGMP (Internet Group Multicast Protocol). IGMP is
a network-layer protocol used to establish membership in a Multicast group - it is
not used to carry user data.
Multicast Select IGMP-v1 or IGMP-v2. 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.
PPP Options
Encapsulation Select CISCO PPP from the drop-down list box if your backup WAN device uses
Cisco PPP encapsulation; otherwise select Standard PPP.
Compression Select this check box to enable stac compression.
Connection
Nailed-Up
Connection
Select Nailed-Up Connection when you want your connection up all the time. The
ZyXEL Device will try to bring up the connection automatically if it is disconnected.
Table 28 WAN Backup Advanced Setup
LABEL DESCRIPTION