Upgrading the IOS (Internetwork Operating System) on a Cisco router or switch is a crucial task to ensure the router's stability, security, and access to new features.
Here's a general guide on how to upgrade the IOS on a Cisco device
Step 1: Download the New IOS Image
https://software.cisco.com/
Step 2: Prepare TFTP Server
Step 3: Connect to the Router
Step 4: Verify Current IOS Version: Use the "show version" command to verify
Step 5: Copy the New IOS Image: "copy tftp flash"
Step 6: Set the Boot Path: Use the "boot system flash:filename" cmd to set the boot path
Step 7: Verify Boot Configuration: Use the "show boot" command to verify
Step 8: Save Configuration: "write memory" command.
Step 9: Reload the Router: "Reload"
Step 10: Verify the Upgrade: Use the "show version" command to verify
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