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How to back up core switch data

Backing up core switch data involves saving running configurations and core files to secure remote locations using protocols like TFTP, FTP, SCP, or SFTP, ensuring quick recovery and operational continuity.Backing Up Switch Configurations
  1. Access Privileged EXEC Mode Enter privileged EXEC mode on your switch to execute configuration commands securely. This typically requires a password and provides full access to configuration management .
  2. Save Running Configuration to Startup Configuration Use the command copy running-config startup-config to store the current active configuration in NVRAM. This ensures the configuration persists after a reboot .
  3. Copy Configuration to Remote Server For disaster recovery, copy the configuration to a remote server using one of the following protocols:
    • TFTP: copy running-config tftp:
    • FTP: copy running-config ftp:
    • SCP/SFTP: copy running-config scp: Provide the server address and file name when prompted. SCP/SFTP is preferred in high-security environments due to encryption .
  4. Automate Backups (Optional) On supported platforms, you can schedule automated backups using CLI tools like Kron or GUI-based management dashboards. Note that some models, like Catalyst 9000 series, may have limitations due to known bugs .
Backing Up Core Files

Core files capture the state of the switch during faults or crashes and are critical for troubleshooting:

  1. Enable Core Collection Configure the switch to collect kernel cores if a crash occurs. This can be done in configuration mode and optionally disabled if not needed .
  2. Copy Core Files to Remote Destination Use the command format: copy core://module/process-id[/instance] destination://[[user@]host/] Supported destinations include bootflash, slot0, usb1, or a remote host via TFTP, SCP, or SFTP. Ensure the destination directory exists and has proper write permissions .
  3. Passwordless SSH for Automation For secure automated transfers, configure passwordless SSH to remote hosts. This allows core files to be copied automatically without manual intervention .
Verification and Best Practices
  • Verify Backup Integrity: Compare the backup file with the running configuration to ensure it is complete and uncorrupted .
  • Secure Storage: Store backups in secure, accessible locations and consider encryption for sensitive configurations .
  • Regular Backups: Perform routine backups, especially before firmware upgrades or configuration changes, to minimize downtime and mitigate human error .
  • Document Procedures: Maintain a clear backup and restoration procedure for audit and compliance purposes . By following these steps, network teams can ensure rapid recovery from failures, maintain operational continuity, and protect against configuration loss.
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