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SmartSwitch Router 2100 Getting Started Guide 5

Chapter 1: Features Overview

This guide and other SSR 2100 documentation refers to the SSR 2100’s Layer-2, Layer-3,

and Layer-4 switching and routing. These layers are based on the International Standards

Organization (ISO) 7-layer reference model. Here is an example of that model. The

SSR 2100 operates within the layers that are not shaded. Notice that Layer-2 is divided

into an LLC layer and a MAC layer. The SSR 2100 operates at the MAC layer but not the

LLC layer.

TCP/UDP Services

The following table lists some well known TCP/UDP services provided by the SSR 2100.

Features

This section describes the following SSR 2100 features:

• Address-based and flow-based bridging

• Port-based VLANs and protocol-based VLANs

• IP and IPX routing

Layer 7 Application

Layer 6 Presentation

Layer 5 Session

Layer 4 TCP/UDP - application

Layer 3 IP/IPX - routing

Layer 2 LLC

Layer 2 MAC -bridging

Layer 1 Physical Interfaces

Table 2. TCP/UDP services

TCP Port UDP Port Description

23 Telnet

161 SNMP

67 BOOTP/DHCP Relay Agent

520 Routed

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 73 74

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Cabletron Systems SmartSwitch Router Spécifications Page 21