Troubleshooting guide

CHAPTER

11-1

ATM and Layer 3 Switch Router Troubleshooting Guide

OL-1969-01

Troubleshooting Layer 3 Network Connections

This chapter provides troubleshooting information about connectivity and performance problems in the

Layer 3 network connections of the switch router.

The chapter includes the following sections:

• Overview of Layer 3 Switching, page 11-1

• Defining Layer 3 Switching, page 11-2

• System Architecture, page 11-8

• Troubleshooting Half- or Full-Duplex Negotiation, page 11-21

• Troubleshooting IP Layer 3 Connections, page 11-25

• Troubleshooting IPX Layer 3 Routing, page 11-38

• Troubleshooting Layer 3 IP Multicast Switching, page 11-43

• Troubleshooting IP and IPX Load Balancing, page 11-49

• Troubleshooting Route Processor Route Table and Utilization Problems, page 11-51

• Troubleshooting SDM Problems, page 11-56

Note For detailed cabling and hardware information for each port adapter, refer to the Catalyst 8540 CSR

Route Processor and Interface Module Installation Guide.

Overview of Layer 3 Switching

This section provides an overview of Layer 3 switching using the switch router. It shows how a switch

router fits into the network, the architecture of the switch router, and the course of a Layer 2 and Layer

3 packet through the switch router. Also included is a list of Layer 3 switching software features with

brief descriptions of selected features.