http://www.tcpipguide.com/free/t_DHCPGeneralOperationandClientFiniteStateMachine.htm
I'm reading through the entire Discover, Offer, Request, Acknowledgement phases in DHCP. And I am really confused. My confusion lies in what is being sent and received in these packets. I've done wiresharking and still I am confused.
DHCP Discover.
Source IP=0.0.0.0(Since client doesn't have an IP address)
Destination IP=255.255.255.255(Since destination is broadcast IP address)
Source Ethernet Address=hardware address of client who doesn't yet have an IP
Destination Ethernet Address=All F's(as it's broadcasted to everyone)
DHCP Offer
Server makes an offer of IP address.
As per wireshark, source IP=IP of DHCP server =10.13.166.0. Destination IP=IP of client=10.13.166.166(assigned IP). But that doesn't make any sense as the client yet hasn't got an IP, it's just an offer made.
source ethernet address=hardware address of DHCP server.
Destination ethernet address=hardware address of client requesting IP.
DHCP Request
Client broadcasts DHCP request packet.
Source IP=0.0.0.0(client requesting the IP's IP)
Destination IP=255.255.255.255(broadcast IP)
DHCP Acknowledgement
Server sends/confirms IP to client requesting the IP.
Source IP=IP Of DHCP Server
Destination IP=Assigned IP Of device
Source ethernet address=Hardware address of DHCP server
Destination ethernet address=Hardware address of client requesting IP.
My confusion lies here again, should not the destination IP still be broadcast.
