Meraki hub and spoke

[Chandru_kumar]

I have a 40 spoke , All branches already  running MPLS service for communicate between  spoke to spoke or spoke to hub, if I am going to install MX only for 20 Sites , another remaining 20 existing old service how will communicate to each other 20 existing spoke to 20 new MX installed spoke 

Another , why add static routes in  DC

[ww]

You can place a mx as concentrator/hub beside your current hub. Then let them talk bgp to exchange routes. 

[alemabrahao]

You just need to communicate via HUB. If you have the same HUB for each Spokes, they will announce and receive routes between them via the HUB.

[Alejandro_F]

Hi @Chandru_kumar,

There are a couple of topologies you could use.

1. Place an MX hub, and configure all the remote sites as Spoke. By default the spokes will receive routes to communicate other spokes through the Hub.

https://documentation.meraki.com/MX/Networks_and_Routing/MX_Routing_Behavior#Spoke-to-Spoke_Communic...

Or 

2. Create a full Mesh topology by configuring each Spoke as Hub. If all the MXes are configured in Hub, all the routes will be advertised to the peers. This topology is not recommended for big networks since the routes could scale up really quick by adding new spokes.

https://documentation.meraki.com/MX/Site-to-site_VPN/Meraki_Auto_VPN_-_Configuration_and_Troubleshoo...