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Re: Is it guarentee ISSU chassis cluster upgrade no downtime?

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Hello ,

 

Using ISSU we can upgrade without any downtime . But it depends upon from which version to which version you are upgrading

 

Till 12.1X44 we have some limitation , but upgrading from 12.1X46 and above does not have any limitations and personally have done multiple upgrades without any issues . But make sure the cluster is in good health .

 

From 11.4 if you need to upgrade , its not much recommended since we have seen multiple issue .  But from 12.1X46 it works fine.


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