cloudstack/systemvm/debian/etc/radvd.conf.tmpl

interface {{ GUEST_INTERFACE }}
{
    AdvSendAdvert on;
    MinRtrAdvInterval 5;
    MaxRtrAdvInterval 15;
    prefix {{ IPV6_CIDR }}
    {
        AdvOnLink on;
        AdvAutonomous on;
    };
{{ RDNSS_CONFIG }}
};