ZyXEL Communications Vantage CNM 2.3 User Manual page 83

Table 22 Device Operation > Device Configuration > Network > WAN > WAN1/2 -
PPPoE (ZyNOS ZyWALL with two WAN ports) (continued)
LABEL
RIP Direction
RIP Version
Multicast
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5.3.2.3 PPTP Encapsulation
Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables secure
transfer of data from a remote client to a private server, creating a Virtual Private
Network (VPN) using TCP/IP-based networks.
Vantage CNM User's Guide
DESCRIPTION
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, None, In Only or Out Only.
When set to Both or Out Only, the Vantage CNM will broadcast its
routing table periodically.
When set to Both or In Only, the Vantage CNM will incorporate RIP
information that it receives.
When set to None, the Vantage CNM will not send any RIP packets and
will ignore any RIP packets received.
By default, RIP Direction is set to Both.
The RIP Version field controls the format and the broadcasting method
of the RIP packets that the Vantage CNM 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. By default, the RIP Version field is set to RIP-1.
Choose None (default), IGMP-V1 or IGMP-V2. IGMP (Internet Group
Multicast Protocol) is a network-layer protocol used to establish
membership in a Multicast group – it is not used to carry user data.
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.
Click this to save your changes back to the Vantage CNM.
Click this to begin configuring this screen afresh.
Chapter 5 Device Network Settings
83