[ixpmanager] Legacy Upgrade Example - v4.9.3 to v5.7.0

[Barry O'Donovan]

Hi all,

when we put together stats for the new website, we noticed a few people 
were still running v4.x of IXP Manager (and a very small number using 3.x).

Community IX Atlanta (CIX-ATL) are in the process of upgrading from 
4.9.3 to the latest and they graciously allowed me to record the process.

If you're interested in upgrading from a legacy version, please see this 
blog post:

https://www.barryodonovan.com/2020/09/08/upgrading-legacy-versions-of-ixp-manager

and this video: https://youtu.be/CXTjgRUESAc

I hope this helps anyone considering such an upgrade. More than 
anything, I hope this video entices you to keep current with your IXP 
Manager installations!

If you do attempt this upgrade, please feel free to follow up with 
questions or shared experiences on this thread.

As always, the full list of available videos is always available at:

https://www.ixpmanager.org/support/tutorials


Thanks,
  - Barry

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Kind regards,
Barry O'Donovan