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Chapter 6 - Planning for Specifying TCP/IP Servers

Introduction

Manage Routing through VINES Networks (see Chapter 10)
Manage Server-to-Server Connections (see Chapter 11)

Required Information

The name of the server. The name is found on the server console on either the System Maintenance menu or the Operator menu.
The serial number of the server. The serial number is also found on either the System Maintenance menu or the Operator menu.
The IP addresses associated with each server. These are found on the IP Interfaces worksheets discussed in Chapter 4.

Note: Servers can have more than one IP address. See the next section, "Deciding Which IP Address to Assign," for more information.

Which TCP/IP options are running on the servers in your network. The servers may be running either the Routing option or the Server-to-Server option, or both.

Deciding Which IP Address to Assign

For Setting Up the Server-to-Server Option

The address is associated with a physical interface. Do not choose an IP address associated with the VINES interface.
The address is shared with a foreign host gateway.

For Setting Up the Routing Option

130.133.2.1

130.133.2.1 - Address on Ethernet
135.124.1.1 - Address on ProNET-10

A network number that does not appear in an IP address already assigned to an interface on your server
A network number that does not appear in an IP address already assigned to another server in your VINES network

Figure 6-1. Automatically Created Routes

Deciding Which Encapsulation Type to Use

Planning Automatic Connectivity

Figure 6-2. Using Automatic Server-to-Server Connections

Configure manual entries for all 41 servers with which you want to establish connections.
Enable automatic connectivity. This allows the administrators of each of the 41 servers to connect with you by creating an entry for Server 1 through the Manage Server-to-Server connections menu. The connections are established whenever these servers attempt to communicate with Server 1.

Note: One side of a server-to-server connection must be explicitly defined.

Manually configure an entry for Server 2, and for each of the 200 PC/TCP workstations in the network.
Enable automatic connectivity. This allows the administrators of each of the other 40 servers to route through Server 3 by creating an entry for Server 3 through the Manage Routing through VINES Networks menu. A route is established from Server 3 to whichever server routes IP traffic through Server 3.

Figure 6-3. Using Automatic Connectivity with TCP/IP Routing

When to Use Automatic Connectivity

Figure 6-4. Inefficient Use of Automatic Connectivity

A host route from Server 3 to Server 1
A network route to 135.100.31, which is the network on which Workstation 1 resides

If the workstation is on the same IP network and subnetwork as Workstation 1, no additional routes are created. Server 3 forwards packets destined for 135.100.31 to Server 1, which then forwards the packet to its destination.
If the workstation is not on the same IP network and subnetwork as Workstation 1, Server 3 constructs a host route to that workstation. For example, if a PC/TCP workstation in network 135.100.32.0 logs in, a host route to that workstation is created.

Securing Automatic Server-to-Server Connections

Example of Specifying Servers

Associate the name or serial number of Server 3 with the appropriate IP address. This must be done because Server 3 has the Routing option installed and resides in Server 1's VINES network.
Associate Server 2's name or serial number with Server 2's IP address. This must be done because Server 1 has the Server-to-Server option installed.

Figure 6-5. Servers with Multiple IP Addresses

Filling Out the TCP/IP Server Information Worksheet

Worksheet for Server - The name of the server you are configuring.

Server Name - The name of the server to which you are assigning the IP address. Names are assigned to servers when they are installed.

Serial Number - The server's serial number.

IP Address - The server's IP address.

Subnetwork Mask - The subnetwork mask for the IP address.

Option - The option installed on the server. Write R for Routing, S-S for Server-to-Server.

Note: Server 2 has both the TCP/IP Routing and Server-to-Server options installed. The administrator of Server 1 is only interested in offering the Mail Services of Server 2. Therefore, only the Server-to-Server option is listed in the Option column.

Figure 6-6. Sample TCP/IP Server Information Worksheet

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