ZyXEL Communications Centralized Network Management Vantage CNM User Manual page 98

Chapter 5 Device Network Settings
Table 29 Device Operation > Device Configuration > Network > WAN Backup > Advanced
(Prestige) (continued)
LABEL
Primary/ Secondary
Phone Number
AT Command Initial
String
Advanced Modem
Setup
TCP/IP Options
Enable SUA
Enable RIP
RIP Direction
RIP Version
Enable Multicast
Version
Multicast Version
PPP Options
PPP Encapsulation
Enable Compression
Connection
98
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 device 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.
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 the Edit button to display the Advanced Modem Setup screen and edit
the details of your dial backup setup.
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. When you select this option the device will
use Address Mapping Set 255 in the SMT.
Select this check box to turn on RIP (Routing Information Protocol), which
allows a router to exchange routing information with other routers.
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 device will broadcast its routing table
periodically.
When set to Both or In Only, the device will incorporate RIP information that it
receives.
The RIP Version field controls the format and the broadcasting method of the
RIP packets that the 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.
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.
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 inter operability between IGMP
version 2 and version 1, please see sections 4 and 5 of RFC 2236.
Select CISCO PPP from the drop-down list box if your backup WAN device
uses Cisco PPP encapsulation; otherwise select Standard PPP.
Select this check box to enable stac compression.
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