Upgrading Cisco switch IOS using tftp server

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Home > Switch configuration notes > Upgrading Cisco switch IOS using tftp server

Normally if the previous image of switch IOS has web interface (flash:/html directory present) then we can use Cisco Network Assistant(CNA) available freely from Cisco website to upgrade switch IOS safely.

But sometimes the web interface would not be there (either to save space or corrupted). Then we can use following method to upgrade switch IOS using telnet / console connection to switch and tftp server. (Note that switch must be connected to tftp server through network.)

To upgrade IOS from telnet and tftp

  1. First delete html directory structure
  2. If still less space is left then take backup of old IOS image and delete it.
  3. Copy new IOS image from tftp server using 'copy tftp: flash:
  4. Then give command similar to 'boot system flash:/c3560-ipbasek9-mz.122-40.SE.bin' to boot from new bin image.
  5. Give reload command to load new IOS

Information related to tftp server configuration is available at tftp server configuration



Home > Switch configuration notes > Upgrading Cisco switch IOS using tftp server

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