Hi,   Do have a look at the following CiscoLive 2018 presentation: BRKCRS-2103 Integrating the Meraki SD WAN Solution with the traditional Enterprise network. The presentation covers several subjects including BGP based path selection for a one-armed concentrator.   The presentation and recording should be available via ciscolive.com   Regards, Marco. ... View more

@NolanHerring is right.  You must configure the actual circuit sizes on the WAN interfaces in the dashboard. ... View more