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Chapter 9 WAN Screens
ZyWALL 5/35/70 Series User’s Guide
192
9.4  The 3G (WAN2) Screen
Use this screen to configure your 3G (WAN2) settings.
After you insert a 3G card in the ZyWALL 5, the 3G connection becomes WAN 2. Refer to 
 for the type of 3G cards that you can use in the ZyWALL along with 
the corresponding supported features.
RIP Version
The RIP Version field controls the format and the broadcasting method of the RIP 
packets that the ZyWALL sends (it recognizes both formats when receiving). 
Choose RIP-1RIP-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.
Enable Multicast
Select this check box to turn on IGMP (Internet Group Management Protocol). 
IGMP is a network-layer protocol used to establish membership in a Multicast 
group - it is not used to carry user data.
Multicast Version
Choose None (default), IGMP-V1 or IGMP-V2. IGMP (Internet Group 
Management Protocol) is a session-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 inter-
operability between IGMP version 2 and version 1, please see sections 4 and 5 of 
RFC 2236.
Spoof WAN MAC 
Address from LAN
You can configure the WAN port's MAC address by either using the factory 
assigned default MAC Address or cloning the MAC address of a computer on 
your LAN. By default, the ZyWALL uses the factory assigned MAC Address to 
identify itself on the WAN.
Otherwise, select this option and enter the IP address of the computer on the LAN 
whose MAC you are cloning. Once it is successfully configured, the address will 
be copied to the rom file (ZyNOS configuration file). It will not change unless you 
change the setting or upload a different ROM file. 
Clone the 
computer’s MAC 
address – IP 
Address
Enter the IP address of the computer on the LAN whose MAC you are cloning.
If you clone the MAC address of a computer on your LAN, it is recommended that 
you clone the MAC address prior to hooking up the WAN port.
Apply
Click Apply to save your changes back to the ZyWALL.
Reset
Click Reset to begin configuring this screen afresh.
Table 44   NETWORK > WAN > WAN (PPTP Encapsulation) (continued)
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