3Com Router User Manual
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http://www.3com.com/ 3Com Router Configuration Guide Published March 2004 Part No. 10014299
3Com Corporation 350 Campus Drive Marlborough, MA 01752-3064 Copyright © 2004, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission from 3Com Corporation. 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change. 3Com Corporation provides this documentation without warranty, term, or condition of any kind, either implied or expressed, including, but not limited to, the implied warranties, terms or conditions of merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time. If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, in the hard copy documentation, or on the removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you. UNITED STATES GOVERNMENT LEGEND If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following: All technical data and computer software are commercial in nature and developed solely at private expense. Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable. You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in, or delivered to you in conjunction with, this User Guide. Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries. 3Com, the 3Com logo, are registered trademarks of 3Com Corporation. Intel and Pentium are registered trademarks of Intel Corporation. Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of Microsoft Corporation. UNIX is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company, Ltd. All other company and product names may be trademarks of the respective companies with which they are associated.
GETTING STARTED 1 SYSTEM MANAGEMENT 33 INTERFACE 121 LINK LAYER PROTOCOL 183 NETWORK PROTOCOL 335 ROUTING 423 MULTICAST 517 SECURITY 543
ABOUT THIS GUIDE
This guide describes 3Com routers and how to configure them.
ConventionsTa b l e 1 and Ta b l e 2 list conventions that are used throughout this guide.
Ta b l e 1 Notice Icons
Ta b l e 2 Text Conventions
IconNotice TypeDescription
Information noteInformation that describes important features or
instructions.
CautionInformation that alerts you to potential loss of data
or potential damage to an application, system, or
device.
WarningInformation that alerts you to potential personal
injury.
ConventionDescription
Screen displaysThis typeface represents information as it appears on the screen.
Keyboard key namesIf you must press two or more keys simultaneously, the key names are
linked with a plus sign (+), for example:
Press Ctrl+Alt+Del
The words “enter”
and type”When you see the word “enter” in this guide, you must type
something, and then press Return or Enter. Do not press Return or
Enter when an instruction simply says “type.”
Words in italicsItalics are used to:
Emphasize a point.
Denote a new term at the place where it is defined in the text.
Identify command variables.
Identify menu names, menu commands, and software button names.
Examples:
From the Help menu, select Contents.
Click OK.
Words in boldBoldface type is used to highlight command names. For example, “Use
the display user-interface command to...”
I GETTING STARTED Chapter 13Com Router Introduction Chapter 23Com Router User Interface
1 3COM ROUTER INTRODUCTION This chapter includes information on the following topics: ■Overview of the 3Com Router System ■Architecture of the 3Com Router ■Features of the 3Com Router Version 1.10 ■New Features of the 3Com Router 1.x Overview of the 3Com Router SystemThe 3Com Router OS is the network operating system platform. With TCP/IP protocol stack as the core, the 3Com Router integrates data communication essentials such as routing technology, multicast technology, QoS technology, VPN technology, security technology in the operating system and provides excellent data transmission capability. The 3Com Router can run on multiple hardware platforms with consistent network interface, user interface and management interface, providing flexible and multiple application solutions for users. This manual describes features and functions of the 3Com Router 1.x system software platform series of low end and middle range routers. In this manual the 3Com Router is also referred to as the 3Com Router 1.x software version. You should make sure that the 3Com Router you use is operating with the software version documented in this manual. The software specification is different between various types of products. Product specification related matters should be confirmed with the 3Com Technical Support Department. Architecture of the 3Com Router With TCP/IP model as its reference, the 3Com Router implements data link layer, network layer, and application layer protocols, as per the architecture shown in the following diagram:
6CHAPTER 1: 3COM ROUTER INTRODUCTION Figure 1 Schematic diagram of the 3Com Router architecture Features of the 3Com Router Version 1.10 The following table lists the basic features of the 3Com Router 1.x: Ta b l e 3 List of the 3Com Router 1.x features System service TCP/UDP IP forwarding engine Fast forwardingIP security and firewallQoS assurance Route policy management RIP OSPF BGP FTPHTTPTELNET VPN PPP/SLIP Configuration management Voice Service ...... Command line SNMP Web management HDLCEthernetX.25Frame Relay AttributeDescription Interconnection protocolLAN■Supports Ethernet_II and Ethernet_SNAP frame structure ■Follows IEEE 802.2 and IEEE 802.3 regulations WAN■Supports Frame Relay and Frame Relay switching ■Supports FRoIP, FRoISDN ■Supports Multi-link Frame Relay (MFR), FR compression ■Supports FR Traffic Shaping (FRTS) to ensure even traffic over the VCs on FR ■Supports X.25 and X.25 switching, X.25 Over TCP (XOT) ■Supports HDLC, SDLC and LAPB regulations ■Supports SLIP, PPP and MP ■Supports PPPoE Client ■Supports ITU-T Q.921 and Q.931 regulations, ISDN (ITU-T Q.921, Q.931) and ISDN semi-permanent connection ■Supports bridging technology Dial-up network■Manages Modem through the AT command and configures script to dial up. ■Supports dial demand Routing (dialer profiles and legacy BDR) ■Supports Callback (PPP callback and ISDN Calling Line Identification callback) ■Provides ISDN leased line, automatic dialing, and cyclic dial queue backup ■Provides Dial interface backup VPN■Supports L2TP, implements VPDN (Supports DNIS user, domain name user, and full name user) ■Supports L3 channel protocol GRE