Thanks for the replies guys. TBH I have been pondering on this and I think that I was making life difficult for myself. With regards to the group policies we'll probably only need a handful as there will be a selection of bandwidths on offer and not a custom bandwidth allowance per office. So my guess is that 10 policies would cover it and applied as necessary to each VLAN. There will still be around 150+ VLAN's though but I think that all the Meraki hardware that we are looking at (MX450, MS410, MS225) will handle that fine. That said, its only going to be the MX450's and MS410's that are going to see all the VLAN's as the MS225's are at the edge and will see roughly a third each.
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