NetcomRouter Guide

Table of Contents

Introduction
How It Works
Features

Multiple IP Networks Per X.25 Network
Multiple Virtual Circuit Connection
Automated X.25 Virtual Circuit Management
Addressing Flexibility
IP Segment Length Control
Flexible X.25 Security Arrangements

IP Network Design
Host and Network Addresses and Masks

Network Classes
Network Number, Host Number and Broadcast Address Conventions

How Internet Addresses Are Used
Identify Hosts and Networks
Assign IP Addresses

subnet Addresses
Network Addresses
Host Addresses

Build Routing Tables

Workstation Routing Tables
Gateway Routing Tables

How IP Works
Introduction
Definitions
Local IP Networks
Foreign IP Networks

Access Via Another Host
Direct Network Connections

X.25 Link Configuration for TCP/IP
Local X.25 Address
Operation With Dial-up X.25 (X.32)

Manual TCP/IP Configuration Changes
Introduction
Driver and Device Structure
TCP/IP Startup Files
TCP/IP Stack Structure
IP Address to X.25 Address Mapping

Tuning NetcomRouter
IP Over X.25 Kernel Tunable Parameters File
IP Over X.25 Interface Configuration

Improving The Performance of IP over X.25
Reducing Costs

Identifying X.25 Hosts That Call You
DDN-style Addressing

Packet Filtering
Introduction
Configuration
Sample Rules File
Variables
Rules Syntax
Uploading filter rules
Checking the rule database
Tracing Packet Filtering Decisions

TCP/IP Troubleshooting


Revision 1.1 (January 2002)

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® Netcom is a registered trademark of The Software Group Limited.