Chapter 4 - RouteFinder Software
MTASR1-100
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An IP address is a combination of a network number and a host number or ID. IP address masks are
used to specify the network or subnet portion of the IP address. IP addresses and masks are 32-bit
values. These are usually provided in what is known as the dotted decimal notation.
The net mask specifies the network or subnet portion of an IP address. The net mask is a 32-bit
value presented in a dotted decimal notation. From the Ethernet IP Setup tab you can switch to the
WAN IP Setup tab or the Advanced IP Setup tab.
The WAN tab allows you to disable or enable IP routing on the WAN port, change the port IP
Address, mask, and remote IP address. If the WAN port is configured for frame relay, this dialog box
allows you to add logical WANs. How the logical IP WAN ports are configured is controlled by the
WAN Port Setup dialog box.
To add logical WAN in a frame relay configuration, click the Add(+) button and the next WAN number
is displayed in the List of Logical WANs window on the left side of the WAN dialog box. To delete the
last logical WAN assigned, click the Delete (-) button.
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
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.