System information

CHAPTER
Troubleshooting LAN Switching Environments 22-451
22
Troubleshooting LAN Switching
Environments
This chapter presents troubleshooting information for connectivity and performance problems in
LAN switching environments.
Troubleshooting LAN Switching Environments
The sections in this chapter describe specific LAN switching symptoms, the problems that are likely
to cause each symptom, and the solutions to those problems.
The following sections cover the most common network issues in switched network environments:
• LAN Switching: No Connectivity to the Directly Connected LAN
• LAN Switching: No Connectivity to LAN or WAN
• LAN Switching: Cannot Access Out-of-Band Management
• LAN Switching: Catalyst 1600 Token Ring Port Fails to Open
• LAN Switching: Catalyst 1600 Does Not Forward Source-Routed Frames
• LAN Switching: Catalyst 1600 Does Not Forward Source-Route Broadcast Frames
• LAN Switching: Poor Performance
LAN Switching: No Connectivity to the Directly Connected LAN
Symptom: A LAN switch cannot connect to devices on its directly connected LAN.
Table 22-1 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table 22-1 LAN Switching: No Connectivity to the Directly Connected LAN