cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
941
Views
5
Helpful
5
Replies

ACI APIC upgrade and leaf/spine upgrade with three weeks in between

laurent.dewilde
Beginner
Beginner

We'd like to upgrade our ACI fabric from 4.2(6d) towards 5.2(3e).

 

The plan is to upgrade the APIC controllers very soon, but only upgrading the leaf/spines after New Year.

 

Is it an issue to upgrade the APIC controllers first and the leaf/spines more than three weeks after?

 

Thanks!

1 Accepted Solution

Accepted Solutions

Hi @laurent.dewilde 

"But when making policy changes on policies not impacted by the new software release, no issue should arise, right?" -> There can be impact especially if default value for some object attributes changed between versions.

"Would provisioning new leafs onto the fabric be an issue with the APICs and leafs running on different versions?" -> Unexpected behavior can be present if different versions are running.

 

If there are plans to perform config changes or leaf/spine provisioning simply do not upgrade the APICs.

 

Stay safe,

Sergiu

 

View solution in original post

5 Replies 5

kristjankristinsson
Enthusiast
Enthusiast

The reason why you should try to upgrade them as soon as possible after is if you are pushing new configuration (or features) which the old software wouldn't understand. For minor releases this is not generally an issue, had several customers that have done exactly what you proposed even with major, so you'll likely not have any issues unless you change the configuration, but that said I don't think it's the recommended approach.

laurent.dewilde
Beginner
Beginner

Thanks for your reply Kristjan. But when making policy changes on policies not impacted by the new software release, no issue should arise, right?

Would provisioning new leafs onto the fabric be an issue with the APICs and leafs running on different versions?

 

 

Hi @laurent.dewilde 

"But when making policy changes on policies not impacted by the new software release, no issue should arise, right?" -> There can be impact especially if default value for some object attributes changed between versions.

"Would provisioning new leafs onto the fabric be an issue with the APICs and leafs running on different versions?" -> Unexpected behavior can be present if different versions are running.

 

If there are plans to perform config changes or leaf/spine provisioning simply do not upgrade the APICs.

 

Stay safe,

Sergiu

 

Thanks for your reply, Sergiu!

 

Clear!

RedNectar
Advisor
Advisor

Hi @laurent.dewilde ,

For an example of what can go wrong see https://rednectar.net/2020/09/05/aci-version-mismatch-alert-dont-use-v5-on-apic-and-v14-on-leaves/

Disclaimer: The link above is to MY personal website and is included as an informational service only.

RedNectar aka Chris Welsh.
Forum Tips: 1. Paste images inline - don't attach. 2. Always mark helpful and correct answers, it helps others find what they need.
Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: