work as expected ! thanks Victor
tested on a dhcp static mapped machine
10:28:56.517020 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 348)
192.168.10.254.67 > 192.168.10.210.68: BOOTP/DHCP, Reply, length 320, xid 0x2811d711, Flags [none]
Your-IP 192.168.10.210
Client-Ethernet-Address 00:0c:29:65:9f:60
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Offer
Server-ID Option 54, length 4: 192.168.10.254
Lease-Time Option 51, length 4: 86399
Subnet-Mask Option 1, length 4: 255.255.255.0
Default-Gateway Option 3, length 4: 192.168.10.254
Domain-Name Option 15, length 13: "kiokoman.home"
Domain-Name-Server Option 6, length 8: 172.17.0.100,192.168.10.202
Hostname Option 12, length 11: "MediaServer"
NTP Option 42, length 12: 192.168.10.200,172.17.0.100,172.16.0.100