Sorry, I'm late.

Here is my full configuration

===================================================================

log "/var/log/bird/bird.log"  { debug, trace, info, remote, warning, error, auth, fatal, bug };
debug protocols all;

# Loopback IP
router id [bird-server lo ip];


protocol kernel {
        persist;                # Don't remove routes on bird shutdown
        scan time 20;           # Scan kernel routing table every 20 seconds
        import none;            # Default is import all
        export all;             # Default is export none
        merge paths on;         # Enable ECMP Multi path.
}

protocol direct {
        interface "lo";
}

protocol device {
        scan time 10;           # Scan interfaces every 10 seconds
}

protocol bfd {
        multihop {
            min rx interval 300 ms;
            min tx interval 300 ms;
            multiplier 3;
        };
}

protocol static {

        route [swich A router-id] via [interface IP to switch A];
        route [swich B router-id] via [interface IP to switch B] ;
}

# BGP Configuration
protocol bgp as1 {
        import all;
        export all;

        # local Loopback IP
        # neighbor (tchy loopback ip)
        local [bird-server lo ip] as 65001;
        neighbor [swich A router-id] as 65001;
        hold time 30;
        enable route refresh off;
        bfd on;
}

protocol bgp as2 {
        import all;
        export all;

        local [bird-server lo ip] as 65001;
        neighbor [swich B router-id] as 65001;
        hold time 30;
        enable route refresh off;
        bfd on;
}

===================================================================  

Please check  it.

Regards.