You are implementing an EVPN overlay in your IP fabric data center. The IP fabric was stable before configuring the overlay group and EVPN-related settings. After committing the configuration shown in the exhibit on your spine device, you are no longer exchanging any routes in your underlay fabric.
In this scenario, what will solve this problem?
The problem resides in the BGP family configuration. The EVPN NLRI family declaration should be applied under the overlay BGP group to correctly signal EVPN routes. Without this declaration, the BGP sessions will not properly exchange EVPN routes. Moving the EVPN NLRI family declaration to the overlay group will ensure that EVPN signaling is correctly configured, allowing the routes to be properly exchanged.
A is correct. BGP default behavior is to exchange ipv4 unicast family unless you explicitly defined another family. Then you have to defined the ipv4 unicast family if you want to receive ipv4 routes.
A is correct
A. family evpn signaling