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CHAPTER
46-1
Cisco IE 2000 Switch Software Configuration Guide
OL-25866-01
46
Troubleshooting
This chapter describes how to identify and resolve software problems related to the Cisco IOS software
on the switch. Depending on the nature of the problem, you can use the command-line interface (CLI),
Device Manager, or Network Assistant to identify and solve problems.
For additional troubleshooting information, such as LED descriptions, see the Cisco IE 2000 Switch
Hardware Installation Guide.
Finding Feature Information
Your software release may not support all the features documented in this chapter. For the latest feature
information and caveats, see the release notes for your platform and software release.
Use Cisco Feature Navigator to find information about platform support and Cisco software image
support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on
Cisco.com is not required.
Information for Troubleshooting
Autonegotiation Mismatches Prevention
The IEEE 802.3ab autonegotiation protocol manages the switch settings for speed (10 Mb/s, 100 Mb/s,
and 1000 Mb/s, excluding SFP module ports) and duplex (half or full). There are situations when this
protocol can incorrectly align these settings, reducing performance. A mismatch occurs under these
circumstances:
• A manually set speed or duplex parameter is different from the manually set speed or duplex
parameter on the connected port.
• A port is set to autonegotiate, and the connected port is set to full duplex with no autonegotiation.
To maximize switch performance and ensure a link, follow one of these guidelines when changing the
settings for duplex and speed:
• Let both ports autonegotiate both speed and duplex.
• Manually set the speed and duplex parameters for the ports on both ends of the connection.