Specifications

40 Chapter 2. Planning for Router Configuration

TCP/IP Ethernet Routes

You normally do not need to define an Ethernet IP route. An Ethernet IP route consists of an IP

address, a mask, a metric, and a gateway. An Ethernet route is usually defined when there are multiple

routers on the Ethernet that cannot exchange routing information.

For the WAN Interface

This information is obtained from the Network Administrator.

Source (Target/Local) WAN Port Address

If Network Address Translation (NAT) is enabled, you must specify a source WAN IP address for the

WAN connection to the remote router. Check with your system administrator for details.

If NAT is not enabled, you may need to specify a source WAN IP address for the WAN connection to

the remote router. Check with your system administrator for details.

TCP/IP Remote Routes

An IP route includes an IP address, subnet mask, and metric (a number representing the perceived cost

in reaching the remote network or station).

A TCP/IP Default Route default route should be designated in the routing table for all traffic that

cannot be directed to other specific routes. You will need to define the default route to a remote router

or, in special circumstances, define an Ethernet gateway. There can be only one default route specified.

IPX Routing Network Protocol

VPI and VCI Numbers (for RFC 1483)

The VPI and VCI numbers apply to ATM routers only. Your router may have been preconfigured with

VPI/VCI numbers. If not, you will have to obtain these numbers from your Network Service Provider

and then configure them.

If you are connecting to multiple remote sites, you will need to obtain additional VPI and VCI numbers

from your Network Service Provider and/or Network Access Provider. These numbers identify the

remote destination and must, therefore, be unique for each remote.

DLCI (for RFC 1490)

The DLCI number applies to Frame Relay routers only. Your Network Service Provider or your

Network Access Provider will provide you with a Data Link Connection Identifier (DLCI). The DLCI is

an address identifying your connection.

IPX Routing Entries

The user or the Network Administrator defines this information.

Note: IPX routes define a path to a specific destination. They are primarily needed by the routers to

allow the servers and clients to exchange packets. A path to a file server will be based on the Internal

Network Number of the server. A path to a client will be based on the External Network Number

(Ethernet) of the client.