Troubleshooting guide

Contents
xi
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Internet Group Management Protocol 11-43
Protocol Independent Multicast 11-43
Distance Vector Multicast Routing Protocol 11-45
Cisco Group Membership Protocol 11-45
The Multicast Routing Table 11-46
IP Multicast Troubleshooting Commands 11-47
Troubleshooting IP and IPX Load Balancing 11-49
Troubleshooting IP and IPX Load Balancing Commands 11-50
Troubleshooting Route Processor Route Table and UtilizationProblems 11-51
Troubleshooting Route Processor Route Table Problems Commands 11-52
Troubleshooting Route Processor Route Table Problems 11-52
Troubleshooting Route Processor Selective Packet Discard Problems 11-54
Troubleshooting SDM Problems 11-56
SDM Overview 11-56
Troubleshooting SDM Problem Commands 11-57
Configuring the Switching Database Manager 11-58
Troubleshooting Common Errors When Changing SDM Size 11-60
CHAPTER 12 Troubleshooting Layer 2 Interfaces 12-1
Layer 2 Switching and Bridging Overview 12-1
Layer 2 Switching 12-1
Bridging 12-2
Troubleshooting Layer 2 Switching 12-3
Layer 2 Switching Broadcasts 12-3
Bridging over Fast EtherChannel 12-4
Troubleshooting Layer 2 Switching 12-5
Other Layer 2 Switching Problems 12-10
Layer 2 Connection is Flooding 12-10
Packets are Switched but are Not Appearing on the Wire 12-11
Layer 2 CAM Display 12-11
Check for Spanning Tree Loop 12-11
Layer 2 Bridging Troubleshooting Commands 12-12
Troubleshooting Integrated Routing and Bridging 12-13
IP Switching with IRB Overview 12-13
Before Configuring IRB 12-13
Troubleshooting IRB Connections 12-14
Troubleshooting Trunk Port Problems 12-16
Troubleshooting Trunk Port Problems 12-16
Troubleshooting Fast EtherChannel Problems 12-16