示例：为 DHCPv6 批发网络提供 74 位 IPV6 前缀的 DHCPv6 地址分配池
access {
address-assignment {
pool AddressPool_2 {
family inet6 {
prefix 2001:db8:2222::0/64;
range BitLimit prefix-length 74;
dhcp-attributes {
maximum-lease-time 3600;
grace-period 60;
}
}
}
}
}
}
}