Riverstone Networks RS 3000/3100/3200 Switch Router Getting Started Guide 2-1
2 INTRODUCTION
The Riverstone RS 3000, RS 3100 and RS 3200 provide non-blocking, wire-speed Layer-2 (switching), Layer-3
(routing), and Layer-4 (application) switching. This chapter provides a basic overview of the RS 3000, RS 3100
and RS 3200 software and hardware feature set.
Note For the latest operating software and user documentation, check the
Riverstone Networks web site at www.riverstonenet.com.
2.1 FUNCTIONAL LAYER TERMINOLOGY
This guide, and other RS 3000/RS 3100/RS 3200 documentation, refers to layer-2 (L2), layer-3 (L3), and layer-4
(L4) 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 RS 3000/RS 3100/RS 3200 operates within the layers that
are not shaded. Notice that layer 2 is divided into a MAC layer, an LLC layer, and an LLC2 layer. The
RS 3000/RS 3100/RS 3200 operates at the MAC and LLC layers.
Table 2-1 ISO 7-layer model and RS 3000/3100/3200
capabilities
Layer 7 Application
Layer 6 Presentation
Layer 5 Session
Layer 4 Transport TCP/UDP - application
Layer 3 Network IP/IPX - routing
LLC2
Layer 2 LLC
MAC Bridging
Layer 1 Physical Physical Interfaces