RouteFinder MTASR3 User Guide
MTASR3
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respective metric set to 16 (defined as infinity) is enabled/disabled by this parameter. Poisoned
reverse is a method used by RIP to improve the rate of convergence of the routing tables of
interconnected IP routers. Routers supporting poisoned reverse that receive such RIPs ignore the
entries set to 16 and thus prevent the propagation of unnecessary (and often incorrect when a
topology change occurs) information which in turn speeds up the rate at which RIP will correctly map
the current network topology.
The Ethernet, WAN 1, WAN 2, and WAN 3 tabs allow you to configure parameters for the selected
port. Although these tabs all contain the same option groups, certain parameters may be inactive or
disabled (grayed-out) when they do not apply to the selected port.
RIPv2 packet setup is accomplished at the bottom of the three port tabs. The RIPv2 group enables
you to set up the send and receive packet types as either RIPv2 (default), RIPv1 Compatible, or
None. You can also set up RIPv2 authentication here.
RIP-based routing is normally enabled (checked) but is turned off automatically if the WAN links are
set up for dial-on-demand operation.
A brief description of the RIPv2 group is provided in the following section. For details on other
parameters, refer to the online Help provided with your RouteFinder software.
Routing Information Protocol, Version 2 (RIPv2)
RIPv2 has enhanced “explicit” netmask information and supports several new features including
external route tags, subnet masks, next-hop addresses, and authentication. Subnet mask information
makes RIP more useful in a variety of environments and allows the use of variable subnet masks on
the network. Support for next-hop addresses permits the optimization of routes in an environment
that uses multiple routing protocols. For example, when RIPv2 is being run on a network along with
another IGP, and one router is running both protocols, then that router can indicate to the other RIPv2
routers that a better next-hop than itself exists for a given destination.
The Authentication group is the RIPv2 mechanism for authenticating the sender of the routing that
eliminates the vulnerability of the routing infrastructure. This authentication scheme is essentially the
same mechanism provided by OSPF. Currently, only a plain-text password is defined for
authentication.
For Plain Text RIPv2 authentication, the maximum length of the password is 16 characters; however,
Message Digest authentication can have a key id field of up to 50 characters.
The Advanced tab controls the timers, Dynamic Host Configuration Protocol (DHCP) and Domain
Name System (DNS) servers, the default route, filters, OSPF (Open Shortest Path First), and Static
Routes.
