@DeziB75 wrote: 2. Turn of RTP/SRTP. (My consideration is that otherwise the new switches will interfere?) Never this. Disabling STP because you don't understand it is absolutely the wrong move 100% of the time. When it comes to STP the right answer is to understand it, and set things up so they function properly. If you have unmanaged switches then they will not be running STP today, so there's nothing to "interfere" with. Moreover, all versions of STP can interoperate with each other, so that's still not a concern provided they are set up properly. Meraki implements Rapid-STP which is the 802.1w standard. There's tons fo good resources on the web for it. You really should consider giving one a read through.
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