Can you please advice me on the Process (eg: ITIL) / Checklist to be done before & after the IOS Upgradation for a CISCO Router. For Eg: 7206 VXR PE Router as Service Provider Network.
1. Validation steps required before IOS Upgrade
2. Validation steps required after IOS Upgrade
3. Roll-back plan, if the IOS Upgrade fails
Note: Validation in-terms of Hardware as well as Software Level.
Thanks in Advance for your Answers.
Thanks & Regards,
Guru Prasad R