It's crazy since they are the same company now, but Meraki switches don't do any of the Cisco proprietary protocols except for CDP. VTP, EIGRP, PVST+ are lost in the Meraki world. If you are using VTP, make sure if you insert a Meraki switch that pruning is turned off. It will pass it though, but the Cisco switches may turn off VLANs in between.
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