HP 3000 Manuals

HP3000/iX Network Planning and Configuration Guide

Drawing an Internetwork Map 

This section deals with the internetwork as a whole.  The internetwork
worksheets consist of an internetwork map, which shows an overview of
your internetwork, and an internetwork table.  You will take the
following steps when filling out the internetwork worksheets:

   *   Draw sketches of each network in the internetwork.

   *   Write network names, IP network addresses, and network types.

   *   Draw gateway nodes.

   *   Indicate network boundaries.

An internetwork mapprovides information about the whole internetwork.
Figure 3-1 is an example of an internetwork map.  This sample
internetwork will be used throughout the instructions in this chapter to
help explain the other drawings and tables that make up the configuration
worksheets.

Before you can draw your internetwork map, you must know how many
networks your internetwork will contain, and you must know each network
type (point-to-point, LAN, FDDI, token ring, or X.25).  The internetwork
in the example (figure 3-1) contains six networks.  NET1 and NET5 are
LANs, NET2 is a point-to-point network, NET3 is an X.25 network, NET4 is
a token ring network, and NET6 is an FDDI network.


NOTE  If you have an X.25 network, you should indicate the presence of
      each Datacomm and Terminal Controller (DTC) in your internetwork
      map, as shown in this example (figure 3-1).  Both the NS3000/iX
      node and the DTC must be specially configured for X.25 links.



          Figure 3-1.  Internetwork Map 

Communication Between Networks 

Since the main purpose of the internetwork map is to show how networks
are connected, gateway nodes are the only nodes you should label on the
internetwork map.  All other nodes and their networks can be represented
by drawing sketches of the networks, as shown in figure 3-1.  In the
example, node B is a full gateway that belongs to NET1 and NET2, node A
is a full gateway that belongs to NET1 and NET4, and node C is a full
gateway that belongs to NET1 and NET6.  Nodes G and H are gateway halves
that belong to NET2 and NET5, respectively.


NOTE  Single letters are used to represent node names in this example.
      Actual node names must be in an accepted format.  They may be
      either in the form nodename.domain.organization or they may be in a
      valid domain name format.


Network Boundaries 

Once you have drawn your gateway nodes or routers, you have established
network boundaries.  Consider the example and look at figure 3-1.  Since
node B in the example is a full gateway and belongs to both NET1 and
NET2, the boundary between these two networks is at node B itself.The
boundary between NET2 and NET5 is along the gateway-half link that
connects gateway nodes G and H.

IP Network Addresses 

Each network in your internetwork must have a unique IP network address.
Add these IP addresses to your internetwork map.

In the example, assume that the Class C IP network addresses are those
shown in figure 3-1.  The specific IP node addresses do not need to be
shown until completion of specific parts of the network worksheets, so
node portions of IP addresses will be represented with XXX in some maps
and tables.

MPE/iX 5.0 Documentation