>PC1 and PC2 are connected to same hub. Do you mean "Meraki Router 1" and "Meraki Router 2" are connected to the same hub? If so, then if AutoVPN is enabled on the Meraki MX devices than the PCs will be able to talk to each other.
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But at the level of control and organization it is not a good practice and in the future it avoids several headaches, without the need to do NAT if the two networks need to communicate. You can, doesn't mean you should.
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