Chapter 1 V2.4X Overview; Introduction; Architecture Of V2.4X - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide

1.1 Introduction

Versatile Routing Platform (v2.4x) is the versatile operating system platform of 3Com
Technologies for data communications products. Focusing on IP services, it constructs
a componential architecture, and provides abundant functionality as well as the
application-based tailorability and scalability.
Taking the TCP/IP stack as the core, v2.4x integrates the data communications
technologies in routing, QoS, VPN, security, and VoIP into the operating system, and
offers remarkable data forwarding capability.
v2.4x is a network operating system of which 3Com Technologies owns the exclusive
intellectual property rights (IPR). It provides a uniform set of interfaces (network, user
and management) for various hardware platforms and therefore offers a variety of
flexible application solutions with hundreds of features. Moreover, as a platform of
sustainable development, it can protect network investments.

1.2 Architecture of v2.4x

Using the TCP/IP model as a reference, the architecture of v2.4x implements protocols
at layers encompassing data link, network, and application, as shown in the following
figure:
RIP OSPF RIP OSPF RIP OSPF RIP OSPF
System System System System
service service service service
PPP/ P PPoE PPP/ P PPoE PPP/ P PPoE PPP/ P PPoE
Figure 1-1 v2.4x architecture

Chapter 1 v2.4x Overview

HTTP HTTP HTTP HTTP FTP FTP FTP FTP
IS-IS IS-IS IS-IS IS-IS BGP BGP BGP BGP
Routing policy Routing policy
Route -policy Route -policy
management management management management
IP forwarding engine IP forwarding engine
IP forwarding engine IP forwarding engine
(Unicastforwarding, multicast forwarding) (Unicastforwarding, multicast forwarding)
(Unicast, multicast) (Unicast, multicast)
Fast forwarding IPSec , firewall Fast forwarding IPSec , firewall Fast forwarding IPSec , firewall Fast forwarding IPSec , firewall
Frame Relay Frame Relay Frame Relay Frame Relay
3Com Corporation
...... ...... ...... ......
TELNET TELNET TELNET TELNET
PIM DVMRP MBGP PIM DVMRP BGMP PIM DVMRP BGMP PIM DVMRP MBGP
TCP/UDP TCP/UDP TCP/UDP TCP/UDP
QoS QoS QoS QoS
X25 X25 X25 X25
HDLC HDLC HDLC HDLC
1-1
Chapter 1 v2.4x Overview
VPN VPN VPN VPN
Command line Command line
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SNMP SNMP
SNMP SNMP
Web-based Web-based
Web Web
Configuration Configuration
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ATM ATM ATM ATM