Скачать или смотреть Step by step process to upgrade the IOS on cisco devices in Production Network

Upgrading the Cisco IOS (Internetwork Operating System) on your production network devices can be a daunting task, but it's essential for security patches, new features, and optimal performance. This video is your ultimate step-by-step guide to performing a safe, efficient, and downtime-minimizing IOS upgrade in a live production environment!

We'll walk you through every critical phase, from meticulous planning to post-upgrade verification, ensuring you're confident and prepared for a successful upgrade. You'll learn:

1. *Pre-Upgrade Preparation: The Foundation of Success*
*Understanding the "Why":* When and why to upgrade IOS (security, features, bug fixes).
*Compatibility Checks:* How to use the Cisco Feature Navigator and other tools to ensure the new IOS is compatible with your hardware and current configuration.
*Licensing Considerations:* Verifying required licenses for the new IOS features.
*Image Acquisition & Integrity:* Securely downloading the correct IOS image and verifying its MD5/SHA hash to prevent corruption.
*Backup, Backup, Backup!* Comprehensive steps for backing up your running configuration, startup configuration, and existing IOS image to a secure server (TFTP/SFTP).
*Network Diagram & Inventory:* Why an up-to-date network diagram is your best friend.
*Change Management & Communication:* Notifying stakeholders and scheduling the maintenance window.

2. *The Upgrade Execution: Minimizing Risk*
*TFTP/SFTP Server Setup:* Preparing your server for image transfer.
*Transferring the New IOS Image:* Commands to securely copy the new IOS to your device's flash memory.
*Verifying the Image:* Double-checking the integrity of the transferred image.
*Boot Variable Configuration:* Setting the device to boot from the new IOS image.
*Saving Configuration:* Ensuring your changes are persistent.
*The Reboot Strategy:* Executing the reload command and monitoring the reboot process.
*In-Service Software Upgrade (ISSU) / Stateful Switchover (SSO) (If Applicable):* Briefly explain these advanced features for high-availability upgrades on supported platforms.

3. *Post-Upgrade Verification: Confirming Success*
*Initial Boot Verification:* Checking the `show version` output to confirm the new IOS is running.
*Connectivity Tests:* Pinging critical devices, verifying routing protocols, and checking layer 2 connectivity.
*Feature Verification:* Confirming that expected new features or bug fixes are working as intended.
*System Health Checks:* Monitoring CPU, memory, and interface status.
*Backup New Config:* Taking a fresh backup of the running configuration with the new IOS.

4. *Troubleshooting Common Issues:*
What to do if the device doesn't boot.
Troubleshooting connectivity problems.
Reverting to a previous IOS version (the rollback plan).

This video is an absolute must-watch for network engineers, administrators, and anyone managing Cisco devices in a production environment. Master this process to ensure smooth operations and maintain network stability!

*Don't let an IOS upgrade be a source of stress! Watch now, learn the best practices, and perform your next upgrade with confidence!*


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