DHCP

Our DHCP Setup

Our DHCP is run on Loki mainly, but Logan is on hot standby. DHCP is what gives out the IP addresses to the devices on our network. Without it, we would have to use static IP addresses, or we would not be able to communicate properly. Both of the servers keep each other synced on what IP addresses have been given out to ensure there are no conflicts.

Address Pool

Our scope is 10.21.25.0, as that is our network. The DHCP server only distributes addresses in from 10.21.25.20 to 10.21.25.247. The rest in the network are reserved for servers and printers, or anything else that needs a static IP. The following chart represents our current setup...

Hostname IP address

Gateway 10.21.25.1

Loki (PDC) 10.21.25.3

Fog 10.21.25.4

MacMini 10.21.25.6

MediaXserve 10.21.25.7

Heimdall (ESXI VM's) 10.21.25.8

Odin (Spiceworks) 10.21.25.9

Logan (BDC) 10.21.25.10

LoganWeb (VM on Logan) 10.21.25.11

MediaXserve 10.21.25.15

Macmini Backup 10.21.25.15

NAS 24PinTech 10.21.25.16

Perle IOLAN Console Serv 10.21.25.17

Opengear Console Serv 10.21.25.18

Address Leases

These are all of the current DHCP releases that the DHCP servers have put out that are active.

Reservations

This is where all of our static DHCP-side reservations for our servers, printers, NAS, etc., are located. You can double click any of them to edit their specific settings.

Scope Options

This is where we configure our DHCP options. To configure options that we don't already have set, right click "Scope Options" and click on "Configure Options" and configure what you need. Below are the options we already have set:

These options set where the computers will look for DNS, what our domain name is (CISCOACA.local) and the other options tell computers to PXE boot from FOG and configures the settings they need to boot from FOG.

Policies

These are settings that are applied to certain devices based off of rules defined by the policy, like IP address range, vendor, etc.

The only policy we have currently configured is called UEFI, which applies to network booting via UEFI. It sets options 66 and 67 to make sure devices will boot properly off of FOG. 67 is set to ipxe.efi, and 66 is set to 10.21.25.4.

Server Options

This is where settings can be configured globally across the whole DHCP server. We have non of these currently configured.

Policies (Not within scope)

Same as above policies but global, we do not have this configured.

Filters

This allows you to block or allow certain MAC addresses from receiving DHCP addresses.