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Chapter 5 Device Network Settings
Vantage CNM User’s Guide
85
5.3.3 WAN2 (ZyNOS ZyWALL with 3G WAN)
3G (Third Generation) is a digital, packet-switched wireless technology. Bandwidth usage is
optimized as multiple users share the same channel and bandwidth is only allocated to users
when they send data. It allows fast transfer of voice and non-voice data and provides
broadband Internet access to mobile devices.
" The actual data rate you obtain varies depending on the 3G card you use, the
signal strength of the service provider’s base station, your service plan, etc.
RIP Version 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. By default, the RIP Version field is set to
RIP-1.
Multicast 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.
Apply Click Apply to save your changes back to the Vantage CNM.
Reset Click Reset to begin configuring this screen afresh.
Table 23 Device Operation > Device Configuration > Network > WAN > WAN1/2 - PPTP
(ZyNOS ZyWALL with two WAN ports) (continued)
LABEL DESCRIPTION