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@Jordan M I think you are probably referring to the issue covered in FN74383 - Cisco Access Points That Are Running, Or Have Run, Releases 17.12.4, 17.12.5, 17.12.6, or 17.12.6a May Exhaust Flash Space, Preventing Upgrades for
CSCwf37271, CSCws70285...
The flexconnect functionality only applies to locally switched WLANs @Mark Elsen Under the covers flex also changes some AP behaviour (not configurable) with respect to timeouts for central authentication/association (necessary for sites on WAN links...
As @aleabrahao says the best approach is to reduce the number of VLANs.
> this mean change from flex to local, right?No - the AP can remain in Flexconnect Mode (or change to Local Mode if you prefer) but the point is that the WLAN must be central swi...
> To be honest, the best option on this case is reduced the number of VLANs.
Agreed with that - more than 16 VLANs is just extreme overkill.
Otherwise you have to change to central switching on WLC.