Quick Reference Guide

Troubleshooting | 275

Troubleshooting

This chapter describes how to identify and resolve software problems related to SFTOS on an S-Series

switch. Unless otherwise noted, the term

switch refers to a standalone switch and to a switch stack.

Additional troubleshooting information, such as LED descriptions, is provided in the hardware installation

guide. This chapter consists of these sections:

• Recovering from Flash File System Corruption on page 275

• Recovering from a Software Upgrade Failure on page 276

• Recovering from a Lost Password on page 277

• Recovering from Switch Stack Problems on page 277

• Preventing Auto-negotiation Mismatches on page 278

• Monitoring SFPs on page 280

• Monitoring 10 GE Interfaces on page 281

• Monitoring CPU and Memory Utilization on page 281

• Troubleshooting No Output on the Console on page 282

Recovering from Flash File System Corruption

The S50 stores the startup configuration in an NVRAM section of flash memory. The startup configuration

can become corrupted and unreadable if the write-to-memory operation does not succeed. You can

recognize this condition via the event log messages in Figure 18-260 on page 275, which may appear after

executing the

write memory command.

Figure 18-260. Downloading Software to the Switch

0xe536bd0 (Cnfgr_Thread ): dosFsLib.c : Malformed boot sector. Offset 0, value 2 55.

0xe536bd0 (Cnfgr_Thread ): dosFsLib.c : Problem finding volume data, trying to use the next block as boot

block.

0xe536bd0 (Cnfgr_Thread ): dosFsLib.c : Malformed boot sector. Offset 0, value 2 49.

0xe536bd0 (Cnfgr_Thread ): dosFsLib.c : Ensure this device is formatted and partitions are properly handled.

Verifying CRC of file in Flash File System

TFTP receive complete... storing in Flash File System...

File transfer operation completed successfully.