# tcpdump -#envr dhcp.pcap
    1  14:16:24.317453 00:0b:82:01:fc:42 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 314: (tos 0x0, ttl 250, id 43062, offset 0, flags [none], proto UDP (17), length 300)
    0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:0b:82:01:fc:42, length 272, xid 0x3d1d, Flags [none]
	  Client-Ethernet-Address 00:0b:82:01:fc:42
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: Discover
	    Client-ID Option 61, length 7: ether 00:0b:82:01:fc:42
	    Requested-IP Option 50, length 4: 0.0.0.0
	    Parameter-Request Option 55, length 4: 
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, NTP
    2  14:16:24.317748 00:08:74:ad:f1:9b > 00:0b:82:01:fc:42, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 128, id 1093, offset 0, flags [none], proto UDP (17), length 328, bad cksum 0 (->b404)!)
    192.168.0.1.67 > 192.168.0.10.68: BOOTP/DHCP, Reply, length 300, xid 0x3d1d, Flags [none]
	  Your-IP 192.168.0.10
	  Server-IP 192.168.0.1
	  Client-Ethernet-Address 00:0b:82:01:fc:42
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: Offer
	    Subnet-Mask Option 1, length 4: 255.255.255.0
	    RN Option 58, length 4: 1800
	    RB Option 59, length 4: 3150
	    Lease-Time Option 51, length 4: 3600
	    Server-ID Option 54, length 4: 192.168.0.1
    3  14:16:24.387484 00:0b:82:01:fc:42 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 314: (tos 0x0, ttl 250, id 43063, offset 0, flags [none], proto UDP (17), length 300)
    0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:0b:82:01:fc:42, length 272, xid 0x3d1e, Flags [none]
	  Client-Ethernet-Address 00:0b:82:01:fc:42
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: Request
	    Client-ID Option 61, length 7: ether 00:0b:82:01:fc:42
	    Requested-IP Option 50, length 4: 192.168.0.10
	    Server-ID Option 54, length 4: 192.168.0.1
	    Parameter-Request Option 55, length 4: 
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, NTP
    4  14:16:24.387798 00:08:74:ad:f1:9b > 00:0b:82:01:fc:42, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 128, id 1094, offset 0, flags [none], proto UDP (17), length 328, bad cksum 0 (->b403)!)
    192.168.0.1.67 > 192.168.0.10.68: BOOTP/DHCP, Reply, length 300, xid 0x3d1e, Flags [none]
	  Your-IP 192.168.0.10
	  Client-Ethernet-Address 00:0b:82:01:fc:42
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: ACK
	    RN Option 58, length 4: 1800
	    RB Option 59, length 4: 3150
	    Lease-Time Option 51, length 4: 3600
	    Server-ID Option 54, length 4: 192.168.0.1
	    Subnet-Mask Option 1, length 4: 255.255.255.0