This... I recently became the network engineer for the company I am working with, and one of the challenges has been wireless. Our wireless settings were all over the place (some APs with the dB statically set to 30), and our channel width was set to 40. Once I toned down the dB and I also changed the width from 40 to 20, that has helped tremendously. We use some computers that run telnet based software that is sensitive to locking out and we were going from unlocking 15 sessions/day to 1 every couple of weeks. With the density of our network, changing the settings helped out, and may very well help out OP.
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There are two levels for the content filtering of youtube videos, strict and moderate. I believe google allows further customization for users logged in with their G Suite account. But then you need to have G Suite in your organization. No customization in Meraki is possible. MX provides DPI, but not for HTTPS traffic. You could use the Cisco Umbrella integration which does SSL decryption. Detailed info here: https://documentation.meraki.com/MR/Other_Topics/Integrating_Cisco_Umbrella_with_Meraki_Networks and more about Umbrella's SSL decryption here: https://support.umbrella.com/hc/en-us/articles/115004564126-SSL-Decryption-in-the-Intelligent-Proxy The url filtering can be done based on categories. The URL lists and their categories are sourced from Brightcloud.
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