If you have a L3 switch at each site then you can do the below:   Create a transit VLAN that is used only for the SMF links and has an interface on each LANs core switch. Set the default gateway on each core switch to point to the local MX internal IP Create static routes for the LAN IP subnets at the other two sites pointing to the IP in the transit VLAN for the site.   For example site A has transit VLAN interface 10.1.1.1/24 and local subnet of 192.168.101.1/24 with the MX on 192.168.101.254.  Site B has 10.1.1.2/24, 192.168.102.1/24 and 192.168.102.254 respectively.   At site A the default gateway for the switch is set to 192.168.101.254 and a static route is created for 192.168.102.0/24 pointing to 10.1.1.2. ... View more

Have you found documentation confirming OSPF support on the CS? Or are you planning on running them with IOS-XE? If the former, which I would assume based on the '-M' models, I would try to clarify two points with Meraki support regarding the OSPF functionality would be the same as what is in the MS OSPF documentation. The docs note limitations with warm spare (VRRP). This may be a non-issue, but I couldn't find OSPF docs related to Catalyst switches in Meraki mode. I might also be misunderstanding the design. ... View more

I agree, but the MA-ANT-27 is still wide enough (120º) while covering at least 90 meters depending of course how high it will be mounted over the buses since those buses will probably be quite formidable obstacles for the signal.   MA-ANT-25 does not provide much more coverage directionally than the MA-ANT-20 so in my experience the 27 is the best match for somewhat longer distances 60 - 100 meters. ... View more