??Multicast Protocol – if this parameter is set to None, the router will only use the Internet Group Management Protocol (IGMP), if IP Multicasting is enabled above. This effectively limits multicast data to the local network. If set to DVMRP (Distance Vector Multicast Routing Protocol), the router will also use this protocol to share its multicast information with other routers (much like RIP), in effect, enabling multicasting on the WAN (ISDN) port.
??IGMP Version – configures the router to use either IGMP version 1 or 2. A major difference between the two is that version 2 allows the router to communicate multicast information with other routers (via the ISDN port), even if the other router isn’t using DVMRP.
??DHCP Client (LAN) – this feature allows the LAN port to be assigned an IP address from a DHCP server other than the one in the router. This feature should be enabled only for special configurations (such as the presence of a cable modem on the LAN) where you wish the router to work with a device on the network that must act as a DHCP server. Otherwise, this feature should be kept disabled.
??RIP Spoofing (ISDN) – this feature should only be enabled if you have more than one router on your network and this router is providing your WAN connection. In this case, if the WAN connection is dropped due to inactivity and this feature is enabled, RIP packets will be sent to the other routers on the network telling them that data can still be sent to the WAN via this router. Otherwise, the other routers will learn that the WAN link has been disconnected and will no longer forward packets destined for the WAN to this router, causing the packets to be dropped before Bandwidth on Demand has a chance to reestablish the WAN connection.
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