Unnamed

 option dns-server 2000::100,2000::101,      
    option domain example.com,test1.example.com,
           
duid_type 3
{                        
    hardware_type       6
    hardware_len        6                
    hardware_addr       00:c0:02:12:35:88
}
                                        
subnet 3ffe:ffff:0:f101:: prefix_len 120
{                             
    t1  3600            //3600
    t2  7200            //4600
                                                   
    range 3ffe:ffff:0:f101::16 3ffe:ffff:0:f101::20
    {                                         
        preferred_lifetime 3600         //5000
        valid_lifetime 7200             //5500
        max_renew_count 5
        preference_val 0
    }
}