ZyXEL Communications Prestige 652, User Manual, Page: 106 / 521

Prestige 652 Series User’s Guide
7-14 WAN Setup
Table 7-3 Advanced WAN Backup
LABEL DESCRIPTION
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. When you select this option the Prestige will use
Address Mapping Set 255 (see the
NAT chapter for more information).
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 Prestige 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 Prestige will broadcast its routing table
periodically.
When set to
Both or In Only , the Prestige 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