Specifications

Chapter 1: Features Overview
6 SSR 8000/8600 Getting Started Guide
This guide and other SSR documentation refers to the SSR’s 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 SSR operates within the layers that are not shaded. Notice that Layer 2 is divided into
an LLC layer and a MAC layer. The SSR 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.
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
TCP Port UDP Port Description
23 Telnet
161 SNMP
67 BOOTP/DHCP Relay Agent
520 Routed