Have you packet captured the switch port connected to the physical host where the docker is? You need to see if the packets are actually leaving the host, if they are, then you can probably easily call Meraki support and find where the issue is. Your topology seems sound, but based on the one way traceroute it seems the hangup may be in the docker host. If that's the case you may need to get some help from a linux resource. Although who knows what our fellow members might know! 🙂
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