Motorola Netopia 3342N User Manual
Page 50
Administrator’s Handbook
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IGMP Forwarding: The default setting is Disabled. If you check this option, it will enable Internet Group
Management Protocol (IGMP) multicast for warding. IGMP allows a router to determine which host groups
have members on a given network segment. See
“IGMP (Internet Group Management Protocol)” on
for more information.
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RIP Send Mode: Specifies whether the gateway should use Routing Information Protocol (RIP) broad-
casts to adver tise its routing tables to other routers on your network. You may choose from the following
protocols:
• RIP-1: Routing Information Protocol version 1
• RIP-2: RIP Version 2 is an extension of the original Routing Information Protocol (RIP-1) that expands
the amount of useful information in the RIP packets. While RIP-1 and RIP-2 share the same basic algo-
rithms, RIP-2 suppor ts several new features, including inclusion of subnet masks in RIP packets and
implementation of multicasting instead of broadcasting (which reduces the load on hosts which do not
suppor t routing protocols.
• RIP-1 compatibility: Compatible with RIP version 1
• RIP-2 with MD5: MD5 authentication is an extension of RIP-2 that increases security by requiring an
authentication key when routes are adver tised.
• RIP MD5 Key: Secret password when using RIP-2 with MD5.
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RIP Receive Mode: Specifies whether the Gateway should use Routing Information Protocol (RIP)
broadcasts to update its routing tables with information received from other routers on your network.
The protocol choices are the same as for the RIP send mode.
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Proxy ARP: Specifies whether you want the Gateway to respond when it receives an address resolution
protocol for devices behind it. This is a way to make a computer that is physically located on one net-
work appear to be par t of a different physical network connected to the same Gateway. It allows you to
hide a computer with a public IP address on a private network behind your Gateway, and still have the
computer appear to be on the public network “in front of” the Gateway.
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Static Client Address Translation: If you check this checkbox, this feature allows a statically
addressed computer whose IP address falls outside of the LAN subnet(s) to simply plug in and get
online without any manual configuration on either the host or the Motorola Netopia® Gateway. If
enabled, statically addressed LAN hosts that have an address outside of LAN subnets will be able to
communicate via the Router’s WAN inter face to the Internet. Suppor ted static IP address values must
fall outside of the Router's LAN subnet(s).
• IP Subnets: The IP Subnets screen allows you to configure up to seven secondary subnets and their
DHCP ranges, by entering IP address/subnet mask pairs: