Catalyst 3550 Multilayer Switch - Troubleshooting

- Catalyst 3550 Multilayer Switch -

Troubleshooting
Recovery Procedures

Recovering from Corrupted Software
Recovering from a Lost or Forgotten Password
Recovering from a Command Switch Failure
Recovering from Lost Member Connectivity

Autonegotiation Mismatches

Connectivity Problems

Understanding Ping
Executing Ping
Understanding IP Traceroute
Executing IP Traceroute

Debug Commands

Enabling Debugging on a Specific Feature
Enabling All-System Diagnostics
Redirecting Debug and Error Message Output

1.Recovering from Corrupted Software

Step 1 Connect a PC with terminal-emulation software supporting the XMODEM Protocol to the switch console port.

Step 2 Set the line speed on the emulation software to 9600 baud.

Step 3 Unplug the switch power cord.

Step 4 Press the Mode button, and at the same time, reconnect the power cord to the switch.

You can release the Mode button a second or two after the LED above port 1X goes off. Several lines of information about the software appear along with instructions:

The system has been interrupted prior to initializing the flash file system. The following
commands will initialize the flash file system, and finish loading the operating system
software:


flash_init

load_helper

boot


Step 5 Initialize the Flash file system:

switch: flash_init

Step 6 If you had set the console port speed to anything other than 9600, it has been reset to that particular speed. Change the emulation software line speed to match that of the switch console port.

Step 7 Load any helper files:

switch: load_helper

Step 8 Start the file transfer by using the XMODEM protocol.

switch: copy xmodem: flash:image_filename.bin

Step 9 When the XMODEM request appears, use the appropriate command on the terminal-emulation software to start the transfer and to copy the software image into Flash memory.

xmodem으로 image upload시 엄청난 시간을 필요로 합니다

xmodem upload

.

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