Troubleshooting
This chapter addresses performance-related network problems that can be
caused by topology, switch configuration, and the effects of other devices or
their configurations on switch operation. (For switch-specific information on
hardware problems indicated by LED behavior, cabling requirements, and
other potential hardware-related problems, refer to the installation guide you
received with the switch.)
This chapter includes:
I
I
I
I
I
Troubleshooting Approaches (page 11-2)
Browser or Console Interface Problems (page 11-3)
Unusual Network Activity (page 11-5)
•
General Problems (page 11-5)
•
IGMP-Related Problems (page 11-6)
•
Spanning Tree Protocol (STP) Related Problems (page 11-7)
•
VLAN-Related Problems (page 11-8)
Using the Event Log To Identify Problem Sources (page 11-10)
Diagnostics and management tools (page 11-13), including:
•
Link test (page 11-13)
•
Ping test (page 11-14)
•
Browse configuration (page 11-17)
•
Command prompt (page 11-12)
•
Restoring the factory default configuration (page 11-19)
11
11-1