In most cases you need more than just the Meraki kit to do 802.1x. Meraki supports 802.1x on its wireless access points and its switch ports too. In addition you’ll need a RADIUS server to respond to access requests (unless you use Meraki Authentication which is pretty basic) and if you intend to do EAP-TLS you’ll also need the infrastructure to issue certificates and get certificates onto the Chromebooks. It’s easier to do straight username and password authentication. You still need the RADIUS server (or use Meraki Authentication), but you don’t need to get certificates onto devices. See here, https://documentation.meraki.com/MR/Encryption_and_Authentication/Configuring_Clients_for_802.1X_and_Meraki_Authentication fordetails on how to configure various clients for 802.1x when using Meraki Authentication. Configuring a RADIUS server depends on the server you use, but this document provides a good overview of the process, although it’s based around Windows clients and Microsoft NPS server, https://documentation.meraki.com/MR/Encryption_and_Authentication/Configuring_RADIUS_Authentication_with_WPA2-Enterprise
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