12-13-2021 12:54 AM
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!
Solved! Go to Solution.
12-13-2021 02:16 AM
"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
12-13-2021 01:16 AM
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.
12-13-2021 01:41 AM
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?
12-13-2021 02:16 AM
"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
12-13-2021 02:39 AM
Thanks for your reply, Sergiu!
Clear!
12-13-2021 11:20 AM
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.
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