What happens when you have 2 DHCP servers on a network?

If you are considering multiple DHCP servers, remember that multiple DHCP servers cannot share any of the same addresses. If you use more than one DHCP server in your network, each server must be configured with their own unique IP address ranges.

What happens when a device receives a DHCP offer message from a DHCP server?

The client, having received the DHCP Offer message, recognizes there is a DHCP server available on the same subnet. Then it broadcasts a DHCP Request message to the server over the Ethernet network, requesting network configuration data including an IP address for itself.

What is split scope in DHCP?

When a scope is split, the result is two scopes, each of which excludes the IP addresses the other scope (and server) manages. When you split a scope, you can specify a delay for the secondary scope.

What is the purpose of the offer message in the DHCP sequence?

The offer message includes the selected IP address and information about services that can be configured for the client. Each server temporarily reserves the offered IP address until the client determines whether to use the IP address.

Can I have multiple DHCP servers on a single router?

1. If the router / layer 3 switch separating them can act as a BOOTP/DHCP relay agent, then you can continue to keep all your DHCP server(s) in one or two central parts of your network and configure your DHCP server(s) to support multiple ranges of addresses.

Why do I receive multiple DHCP offers?

DHCP Request: In most cases, the client can receive multiple DHCP offer because in a network there are many DHCP servers (as they provide fault tolerance). If the IP addressing of one server fails then other servers can provide backup. But, the client will accept only one DHCP offer.

What happens if a DHCP server receives a DHCP request first?

Whichever DHCP Server’s DHCPOFFER packet is received first by the Client will “win”, and that Server will receive a DHCPREQUEST from the Client. This can actually cause a Denial of Service condition depending on the circumstances. In a past job, I worked in the NOC of a regional ISP.

How does DHCP work on a simple network?

2 Answers 2 DHCP on a simple network works using the DORA principle. Multiple DHCP servers PT 1: Spanning multiple subnets. Multiple DHCP servers PT 2: DHCP servers that serve the same network segment. Splitting the scope – best practice Combining these ideas