General Wan - Prestige - ZyXEL Communications VANTAGE CNM User Manual

Table 35 Configuration > WAN > Dial Backup > Edit – ZyWALL (continued)
LABEL
Enable SUA
Broadcast Dial Backup
Route
Enable Multicast
Multicast Version
Enable RIP
RIP Direction
RIP Version
Apply
Reset
8.4 General WAN – Prestige
This section gives background and configuration information on the fields displayed in this
screen.
Chapter 8 Configuration > WAN
DESCRIPTION
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 ZyXEL
device will use Address Mapping Set 255 in the SMT (see the section on
menu 15.1 for more information).
Select the check box to enable SUA. Clear the check box to disable SUA so
the ZyXEL device does not perform any NAT mapping for the dial backup
connection.
Select this check box to forward the backup route broadcasts to the WAN.
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 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, RFC1058 and RFC 1389) allows a router
to exchange routing information with other routers. The RIP Direction field
controls the sending and receiving of RIP packets. Select the RIP direction
from Both/In Only/Out Only/None. When set to Both or Out Only, the
ZyXEL device broadcasts its routing table periodically. When set to Both or In
Only, it incorporates the RIP information that it receives; when set to None, it
does not send any RIP packets and ignores any RIP packets received. Both
is the default.
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). 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.
Click Apply to save your changes back to the ZyXEL device.
Click Reset to begin configuring this screen afresh.
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