There are no modules officially supported on Meraki's SFP page, but I have some 10GTek 10GBase-BIDI links operating successfully. This is SMF though, not sure if they also offer MMF solutions.
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AFAIK it should prefer the master switch first. Then switch ID 2, 3, 4, etc. Although you can't necessarily see those switch IDs in dashboard. Exposing that would require a feature enhancement.
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