User guide

RouteFinderT1 User Guide
MTASR2-20328
The Remote IP Address defines the IP address for the destination end of a point-to-point link and is
necessary only of the selected WAN port has been enabled for point-to-point operation.
Note: the remote IP address must fall within the same IP network as the local IP address.
The Frame Type option defines the MAC layer frame encapsulation to be used for IP transmissions
from the specified port. The Ethernet port supports Type II and SNAP frames, but the WAN ports
support only Type II frames.
In the Support group, ICMP Redirect defines if the specified port is permitted to issue an ICMP
Redirect message to the source IP address. The most likely cause of this message is the delivery of
a datagram to a router that is not on the forwarding path to the destination address. This is often due
to a wrong configuration of the IP client sending the datagram. The packet causing the ICMP Redirect
message to be transmitted is forwarded to the appropriate router.
ICMP Mask Reply enables support for nodes on the connected networks to learn their subnet masks.
RIP enables RIP based routing on the specified port, and is normally enabled. However, RIP can be
disabled if you are using WAN links in Dial-on-Demand mode. In such links, disabling RIP will reduce
traffic on the link as this will also disable periodic RIP broadcasts. RIP routing on the port will be
automatically turned off when Dial-on-Demand is enabled in PPP port setup.
Finally, the RIP Poisoned Reverse option defines if Poisoned Reverse RIP messages are supported
on the specified port. Generation and processing of poisoned routes (RIP entries with their 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 information (often incorrect when a topology change
occurs) which in turn speeds up the rate at which RIP will correctly map the current network topology.
The Ethernet, WAN 1 (T1) and WAN 2 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 Ethernet and WAN 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.
Routing Information Protocol, Version 2 (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