Warm Spare with Dynamic Routing on MX100

[VUNN]

Hello,

      Can I config Warm Spare with Dynamic Routing (OSPF)

      This is my topology:        https://flic.kr/p/28cUssQ

      Thank you so much!

[PhilipDAth]

Are you using MX100 as the Azure router or the gateway in your diagram?

Is this for on-premise or is it going into Azure?

[VUNN]

Hi Philip,
I'm using the Cisco Router to VPN site-to-site to the Azure.
Because as I understand if MX devices are configured in Warm Spare mode, they just need 1 license for both devices but my topology I want to config OSPF between the Router and the MX devices that means In my case MX devices will run separately (active-active) so they need 2 licenses so I want to combind OSPF and Warm Spare mode to reduce the license. Am I right, please advice me?
Thank you so much!

[PhilipDAth]

Note that if you use OSPF in NAT mode you can't use VLANs (VLANs must be disabled).  Also note OSPF can only be used to advertise AutoVPN routes.  The MX does not listen to OSPF routes.

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