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

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 source IP address for a DHCP Discover message?

If any client system is attempting to “Discover” a DHCP Server, it means it does NOT have any IP Address assigned to it so far & is looking for one to join a Network. The source IP address in the Discover packet is 0.0. 0.0 and the destination IP address is 255.255. 255.255 (broadcast).

Can we use .0 IP address?

“0.” networks are used for SNM ( SYSTEM NETWORK MANAGEMENT) and can’t be used for something else. And the IP 0.0. 0.0 is used just to request a valid IP Address from DHCP Server, and the DHCP server replies a dynamic valid IP for request computer.

What is the source IP address in the Discover packet?

In the IP section, you can see the Destination address is 255.255. 255.255 and the Source address is 0.0. 0.0. The DHCP section identifies the packet as a Discover packet and identifies the client in two places using the physical address of the network card.

What is a DHCP Discover packet?

A user turns on a computer with a DHCP client. The client computer sends a broadcast request (called a DISCOVER or DHCPDISCOVER), looking for a DHCP server to answer. The router directs the DISCOVER packet to the correct DHCP server. The server receives the DISCOVER packet.

How does DHCP Discover work?

The client discovers a DHCP server by broadcasting a discover message to the limited broadcast address (255.255. 255.255) on the local subnet. The server determines either that the client is on the network to which the interface is connected, or that the client is using a BOOTP relay agent connected to that network.

Why is DHCP Discover broadcast?

When a DHCP server receives the DHCP Discover message from the client, it also broadcasts a DHCP Offer message over the Ethernet network (because the client IP address has not been allocated yet), informing the client that it is available.

What does dhdhcp discovery mean?

DHCP discovery is done to locate a DHCP Server that can assign an IP address. If any client system is attempting to “Discover” a DHCP Server, it means it does NOT have any IP Address assigned to it so far & is looking for one to join a Network.

Does the DHCP server offer a specific IP address to the client?

In the DHCP trace file noted in footnote 2, the DHCP server offers a specific IP address to the client (see also question 8. above). In the client’s response to the first server OFFER message, does the client accept this IP address?

What is the source address of a DHCPDISCOVER packet?

The client sends a DHCPDISCOVER packet. The following is an excerpt from a network monitor capture showing the IP and DHCP portions of a DHCPDISCOVER packet. In the IP section, you can see the Destination address is 255.255.255.255 and the Source address is 0.0.0.0.

What does the DHCP server identifier field show?

The DHCP: Server Identifier field shows the IP address of the DHCP server offering the lease.