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Hello, 
 
I have 3 different plant, each have his own DHCP Server. 
Each plant belong to a VLAN. 
 
Plant 1: 
VLAN 10 : 192.168.10.0 - 254 
DHCP Server : 192.168.10.12 
 
Plant 2: 
VLAN 20 : 192.168.20.0 - 254 
DHCP Server : 192.168.20.12 
 
Plant 3: 
VLAN 30 : 192.168.30.0 - 254 
DHCP Server : 192.168.30.12 
 
On the switch I specified : ip helper-address 192.168.x0.12 (ip of DHCP server). 
 
How can I make redundancy with the DHCP Server if one of them crashed ? It's 2003 DHCP Server. 
 
Thanks for your help.
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Hello,

I have 3 different plant, each have his own DHCP Server.
Each plant belong to a VLAN.

Plant 1:
VLAN 10 : 192.168.10.0 - 254
DHCP Server : 192.168.10.12

Plant 2:
VLAN 20 : 192.168.20.0 - 254
DHCP Server : 192.168.20.12

Plant 3:
VLAN 30 : 192.168.30.0 - 254
DHCP Server : 192.168.30.12

On the switch I specified : ip helper-address 192.168.x0.12 (ip of DHCP server).

How can I make redundancy with the DHCP Server if one of them crashed ? It's 2003 DHCP Server.

Thanks for your help.

DHCP Server redundancy

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol. DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for manual setup by a network administrator. The implementation of DHCP relies on a DHCP server to hand out network configuration information to DHCP-capable clients that request an IP address (and other information required or useful in communicating with other devices on an IP network). In addition to an IP address, common configuration information served over DHCP includes a default gateway, subnet mask and DNS sever(s).