CCNA Tutorial: How to upgrade IOS on Cisco Routers | Nettech Media

Cisco IOS upgrade procedure by using TFTP and Packet Tracer.
Step 1: Select a Cisco IOS Software Image
Step 2: Download the Cisco IOS Software Image to the TFTP Server
Step 3: Identify the Router/switch File System to Copy the Image
Step 4: Prepare for the Upgrade
Step 5: Verify that the TFTP Server has IP Connectivity to the Router/switch
Step 6: Copy the IOS image to the Router/switch
Step 7: Verify the Cisco IOS Image in the File System
Step 8: Verify the Boot Variable
Step 9: Save the Configuration and Reload the Router/switch
Step 10: Verify the Cisco IOS Upgrade
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