Hardware DHCP Server

A Dynamic Host Configuration Protocol (DHCP) server is a wireless/wired device (typically a router configured accordingly), or a computer system having any Microsoft network operating system installed in it. Microsoft network operating systems (NOS) are Windows 2000 Server, Windows Server 2003, Windows Server 2008, and Windows Server 2012.

Whatsoever device/computer playing role of a DHCP server, a DHCP server is responsible for providing automatic IP addresses to the computers that are configured to obtain the addresses automatically. Such computers are called DHCP client computers.

Types of IP Addresses

Static IP Address

When a computer in a network is not configured to get the IP address automatically and the administrator has assigned the address to the computer manually, such address is called static IP address.

A static IP address is permanent and does not change automatically, until the administrator manually changes it. Also, by assigning a static IP address to the computer, it becomes easier for the administrator and other users to memorize and locate the machine while communicating with it via local area network (LAN).

Since decent amount of manual intervention is needed while assigning static IP address to the computers, administrators mostly do so in small networks, where the maximum computers do not exceed 15-20 in numbers.

Dynamic IP Address

When a computer in a network is configured to obtain the IP address automatically from the DHCP server that is present in the network, and the DHCP server successfully assigns the address to the client computer, the automatically assigned address is called dynamic IP address.

Unlike static IP address, the dynamic IP address keeps changing automatically as per the availability of the IP addresses in the DHCP address pool.

Administrators deploy the DHCP servers in the networks and configure the client computers to get dynamic IP addresses from the deployed DHCP servers when the networks have large number of computers, say 21-50 or more, and it becomes practically unfeasible to assign the IP address to each computer individually.

DHCP Deployment

Earlier, the DHCP servers were deployed on a full-fledged dedicated hardware computer systems if the number of DHCP client computers were huge in numbers, say 200 or more. If the number of DHCP client computers were less, and the DHCP servers were not expected to consume extra processing or memory, the administrators used to deploy the role of the DHCP server on the servers that were already playing the role of any other server and required less processing. (For example, a print server.).

CISCO SYSTEMS - ENTERPRISE Cisco SF300-48PP 48-port 10/100 PoE+ Managed Switch with Gig Uplinks
Personal Computer (CISCO SYSTEMS - ENTERPRISE)
  • Support for up to 4096 VLANs simultaneously Port-based and 802.1Q tag-based VLANs MAC-based VLAN Management VLAN Private VLAN Edge (PVE), also known as protected...
  • Filters out DHCP messages with unregistered IP addresses and/or from unexpected or untrusted interfaces. This prevents rogue devices from behaving as a DHCP Server.
  • Power 100-240V 50-60 Hz, internal, universal
  • Wirespeed routing of IPv4 packets Up to 512 static routes and up to 128 IP interfaces
  • SSH is a secure replacement for Telnet traffic. SCP also uses SSH. SSH v1 and v2 are supported

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