How to Troubleshoot the Software Configuration Recovering from a Software Failure Before you begin This recovery procedure requires that you have physical access to the switch. This procedure uses boot loader commands and TFTP to recover from a corrupted or incorrect image file. Set the baud rate of the terminal to match the the default rate of 9600 bits per second [bps] of the switch console port. If the baud rate is set to a value other than 9600 bps, access to the console will be lost until the speed is set back to the dafault. Procedure Step 1 From your PC, download the software image file ( image.bin ) from Cisco.com. Step 2 Load the software image to your TFTP server.
Step 3 Connect your PC to the switch Ethernet management port. Step 4 Unplug the switch power cord. Step 5 Reconnect the power cord to the switch or the active switch. As soon as the System LED blinks, press and release the Mode button 2-3 times. The switch enters the ROMMON mode. Step 6 From the bootloader prompt, ensure that you can ping your TFTP server. a) Set switch IP address: set IP_ADDRESS ip_address Example: switch: set IP_ADDRESS 192.0.2.123 b) Set switch subnet mask: set IP_SUBNET_MASK subnet_mask Example: switch: set IP_SUBNET_MASK 255.255.255.0 c) Set default gateway: set DEFAULT_GATEWAY ip_address Example: switch:
set DEFAULT_ROUTER 192.0.2.1 d) Verify that you can ping the TFTP server switch: ping ip_address_of_TFTP_server Example: switch: ping 192.0.2.15 ping 192.0.2.1 with 32 bytes of data... Host 192.0.2.1 is alive. switch: Troubleshooting the Software Configuration How to Troubleshoot the Software Configuration Troubleshooting the Software Configuration 10