Fist, You need get server bgp info.

Open Product Detail

find Example Bird Configuration, such as:

Then, You need paste it in your bird config file.

When we want to announce an IP, here is an example of 2a10:cc44:15f::/48

define myV6Prefix=[
    2a10:cc44:15f::/48
];
protocol static v6{
    ipv6;
    route 2a10:cc44:15f::/48 reject;
}
template bgp yxvm {
    local as 49304;
    neighbor as 49304;
    direct;
    ipv4 {
        import none;
        export none;
    };
    ipv6 {
        import none;
        export filter { if net ~ myV6Prefix then accept; };
    };
}
protocol bgp yxvmv6 from yxvm {
    neighbor fe80::6eb3:11ff:fe5e:132e%eth0;
}