Troubleshooting Tip: FortiGate Hub not sharing routes to Spoke

FortiGate Spoke is configured to share the routes with no route restrictions:

config router bgp
    set as 64520
    set router-id 10.24.1.42
    set ibgp-multipath enable
    set additional-path enable
        config neighbor
            edit "10.24.1.1"|10.24.2.1 --> 6.1
                set soft-reconfiguration enable
                set remote-as 64520

FortiGate HUB is receiving the routes, but is not sharing the routes with the other Spokes:

config router bgp
    set as 64520
    set router-id 10.24.6.63
    set ibgp-multipath enable
        config neighbor
            edit "10.24.6.1" | "10.24.2.1"
                set soft-reconfiguration enable
                set remote-as 64520
                set update-source "vpn-internet2"
                set additional-path both

Solution:

In the BGP neighbors configuration, in FortiGate HUB, enable the route reflector feature:

config router bgp
    config neighbor
        edit "10.24.2.1"
            set route-reflector-client enable
        next