tcpdump_dhclient

sudo tcpdump -i enp37s0 -vv |grep -i bootp -a20
tcpdump: listening on enp37s0, link-type EN10MB (Ethernet), capture size 262144 bytes






00:17:22.938507 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 314)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 98:9d:5d:bc:c9:c2 (oui Unknown), length 286, xid 0x6ea2fee1, secs 56009, Flags [none] (0x0000)
	  Client-Ethernet-Address 98:9d:5d:bc:c9:c2 (oui Unknown)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: Discover
	    Client-ID Option 61, length 7: ether 98:9d:5d:bc:c9:c2
	    Requested-IP Option 50, length 4: 192.168.0.10
	    MSZ Option 57, length 2: 576
	    Parameter-Request Option 55, length 7:
	      Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
	      Domain-Name, BR, NTP
	    Vendor-Class Option 60, length 12: "udhcp 1.19.3"