Below are the steps how DHCP Client/Server relationship works.
dhcpnack is message from dhcp server when dhcp server is not having any ip left in address pool or client fails to respond to offer in given time
dhcp-client
The Integrated Router is both a DHCP client and a server (p 186 BMF)
Dynamic Host Configuration Protocol(DHCP) Server is used to distribute IP in the network automatically from the range specified in the DHCP Server while creating scope. -- By MyNarutoAnime ----
Router is usually configured as a DHCP client for WAN (Internet) network and as a DHCP server for local network.
A. The PTR resource record.
A DHCP server will privide a client with a valid IP address for the network for which the DHCP server is providing a service.Where there is no DHCP server the IP address for a client must be set manually. When doing this care must be taken to ensure that two IP addresses are not set the same on the network.
(DHCP) Dynamic host Configuration Protocol. The Default Port Number is: for DHCP client : 546 for DHCP server : 547
integrated services router
Leases are retained in the DHCP server database four hours after expiration. This grace period protects a client lease in case the client and server are in different time zones, the individual computer clocks are not synchronized, or the client computer is off the network when the lease expires. Expired leases are included in the list of active leases and are distinguished by a different icon.
DHCP client is active by default when TCP/IP is bound to an adapter. DHCP server needs to be installed and configured separately.
1) Client makes a UDP Broadcast to the server with a DHCPDiscover, or Discover packet. 2) DHCP offers to the client. The server sends a DHCPOffer including other configuration parameters (DHCP Options) for the client per the servers configuration file 3) In response to the offer Client requests the server. The client replies DHCPRequest, unicast to the server, requesting the offered address. 4)The server sends DHCPAck acknowledging the request which is the clients final permission to take the address as offered. Before sending the ack the server double checks that the offered address is still available, that the parameters match the clients request and (if so) marks the address taken. A good reference for DHCP information is Droms and Lemon "The DHCP Handbook". BoydK