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@RumbaBoy refer this documentLimitations and RestrictionsWith Cisco Catalyst 9500 Series Switches and Cisco Catalyst 9500 Series Switches - High Performance—If a feature is not supported on a switch model, you do not have to factor in any limitation...
Yes you can upgrade directly, refer below table. Current Software Release Upgrade Path to Release 8.10.196.08.5.xYou can upgrade directly to Release 8.10.196.0.8.6.xYou can upgrade directly to Release 8.10.196.0.8.7.xYou can upgrade directly to Relea...
If 5GHz is configured and have you checked the power consumption of that AP. if it doesn't have enough power then it will run on 2.4Ghz.https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-1850-series-access-points/datasheet-c78-734256....
You can perform a Direct upgrade no intermediate is required and your ROM also get upgraded in version 17. After upgrade cross verify the version and ROM version sometimes it will says ROM upgrade needs a Reload.
