What is the source IP of a DHCP packet?

0.0.0.0
The first time a DHCP client computer attempts to log on to the network, it requests IP address information from a DHCP server by broadcasting a DHCPDiscover packet. The source IP address in the packet is 0.0. 0.0 because the client does not yet have an IP address.

What is an IP address that is automatically generated by DHCP server?

A networked device configured to use Auto IP first makes a request to a DHCP server for an address. If the device does not receive an IP address, which happens when there is no DHCP server on the network or when the DHCP server is not responding, the device assigns itself an address.

Why is that the source IP address of the DHCP Discover all 0’s?

The source IP address is 0.0. 0.0 since the client does not have a configured IP address. If a DHCP server exists on this local subnet and is configured and operating correctly, the DHCP server will hear the broadcast and respond with a DHCPOFFER message.

What is a DHCP Offer message?

DHCP Offer This message contains the network information, such as client IP address, subnet mask, default gateway IP address, DNS IP address, IP lease time and DHCP server IP address.

What is a DHCPDISCOVER message?

The message comes from a server offering an IP address. The message comes from a client seeking an IP address. All hosts receive the message, but only a DHCP server replies. When a host configured to use DHCP powers up on a network it sends a DHCPDISCOVER message.

What is the source and destination address of a DHCP packet?

The Source address is the DHCP server IP address, and the Destination address is still 255.255.255.255. The YIADDR field contains the client’s address, and the CHADDR and DHCP: Client Identifier fields are the physical address of the network card in the requesting client. The DHCP Option section identifies the packet as an ACK.

How IP addresses are assigned in DHCP?

IP address is assigned from a pool of addresses. In DHCP, the client and the server exchange mainly 4 DHCP messages in order to make a connection, also called DORA process, but there are 8 DHCP messages in the process. These messages are given as below: DHCP discover message –

What is DHCP release message?

DHCP Release If the client does not need its allocated IP address any longer, it unicasts a DHCP Release message (Destination MAC=DHCP Server MAC (m2), Destination IP=DHCP Server IP (1.1.1.254)) to the DHCP server. The server then releases the client IP address (1.1.1.10) listed in the Client IP field of the received message.