prtg logo white

Monitoring DHCP with PRTG

 

  • icon check white 2
    Ensure the DHCP Server
    service is running

  • icon check white 2
    Check that DHCP is
    allocating addresses
     
  • icon check white 2
    Check the response time
    of your DHCP Servers

  • icon check white 2
    Be notified when address pools are running low


 

Free Download

Unlimited use of PRTG for 30 days. After 30 days PRTG reverts to the freeware edition.
You can upgrade to a paid license at any time.

 

 

 

 

 

What is DHCP?


Dynamic Host Configuration Protocol, or DHCP, is a vital component in most network infrastructures. Its purpose is to automatically assign IP addresses to client devices connecting to the network. Without DHCP, administrators would have to manually assign IPs to every device on the network – a time-consuming and error-prone exercise.

 

Why DHCP Monitoring is important


Since the DHCP server is responsible for assigning IP addresses on your network, a failure in this sphere could cause serious problems. When there is a DHCP issue newly connected devices are assigned a default Class B IP address. In this fallback configuration, they cannot communicate with other devices or be reached on the network. A point to note is that similar problems can occur when the address space assigned to the DHCP server is exhausted.

What is DHCP monitoring?

With DHCP monitoring you can always see whether your DHCP server is running as it should. And in case of problems, you will be promptly notified by PRTG so that you can intervene in a timely manner. In most cases, this will enable you to fix the problem before it even becomes noticeable on the network.

 

Free Download

Unlimited use of PRTG for 30 days. After 30 days PRTG reverts to the freeware edition.
You can upgrade to a paid license at any time.

 

3 important aspects of DHCP

 i What is a sensor?

In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, e.g. the traffic of a switch port, the CPU load of a server, the free space of a disk drive. On average you need about 5-10 sensors per device or one sensor per switch port.

View video (3:26 min.)

 

There are three important aspects of DHCP that administrators should be monitoring, and PRTG can help with them all.


first

 

Firstly, admins need to make sure that the DHCP service is actually running. In most AD environments, the Domain Controllers usually run the DHCP service. So, by applying a simple WMI Service Sensor and configuring it to watch the “DHCP Server Service”, the admin will always know the state of the service. Should the service stop, PRTG can be configured to automatically try to restart the service, and inform the admin if the attempt was successful:

 

 DHCP Sensor


second

 

The second important test is to see if the server is actually allocating addresses. This is where the dedicated PRTG DHCP Sensor comes into play. It will send a broadcast message out to the network, requesting an IP address, and then waits for a DHCP to respond. The sensor then reports on how long it takes for the server to respond, the IP of the responding server, the allocated IP address and its lease duration.

 

 DHCP Sensor


third

 

The final important metric for DHCP servers is how many IP addresses are available for the allocation to clients. DHCP servers are configured with ranges of IP addresses, the so-called DHCP scopes. A DHCP server semi-randomly chooses an IP address from its scope to allocate it to a client that connects to the network. Such an IP address has a configurable lease time or lifespan, and administrators must take care to balance the length of these leases with the size of the available scope, and the number of anticipated clients.


help

 

This is where PRTG can help. By using an EXE/Script Advanced sensor that runs a custom PowerShell script, admins can easily keep track of their DHCP scope status. Find more information and the PowerShell script in our Knowledge Base: Single sensor to display DHCP scope status.

 

 A sneak peek at monitoring with PRTG

 

PRTG simplifies your day

Our monitoring software works for you and promptly notifies you of potential issues.
It frees you to concentrate on your day-to-day tasks with peace of mind.

 

time white

PRTG saves time

With PRTG, you get one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.

brain white

PRTG saves worry

Customizing PRTG is a breeze. Getting started or switching from another network monitoring tool is easy thanks to the auto-discovery and pre-configured device templates.

money white

PRTG saves money

80% of our customers report substantial or even exceptional cost savings in the area of network monitoring. The experience shows that the costs for licenses have paid for themselves within a matter of weeks.

 

 

quote markus puke

“We can all work with greater peace of mind knowing
that our systems are constantly being monitored.”

Markus Puke, Network Administrator, Schüchtermann Klinik, Germany

 

Keep a constant eye on your network – even while on the go

PRTG can be started within minutes and it's compatible with many mobile devices.

 

PRTG comes with all the features you need, plus more your IT infrastructure won't want to live without.

vendors vm ware

 

PRTG monitors these vendors and applications, and more, in one view!

 

 

Trusted by 500,000 users and recognized
by industry analysts as a leader

 

“Fantastic network and infrastructure monitoring solution that is easy to deploy and easier still to use. Simply the best available.”

Read more reviews

“Software is absolutely perfect, Support is superior. Meets all needs and requirements, this is a must have solution if you are needing any form of monitoring.”

Read more reviews

“The tool excels at its primary focus of being a unified infrastructure management and network monitoring service.”

Read more reviews

 

Free Download

Unlimited use of PRTG for 30 days. After 30 days PRTG reverts to the freeware edition.
You can upgrade to a paid license at any time.

 

Paessler teams up with many partners

Partnering with innovative IT vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.

 

IP Fabric

Combining the broad monitoring feature set of PRTG with IP Fabric’s automated network assurance creates a new level of network visibility and reliability.

Read more

NetBrain

Integrating monitoring results from PRTG into NetBrain maps makes the foundation for network automation.

Read more

Rhebo

Rhebo and PRTG offer a comprehensive monitoring solution for IT and OT environments: from condition monitoring through to anomaly and threat detection.

Read more

 

 

Over 95% of our customers recommend PRTG

 

Paessler AG worldwide trialled PRTG in over 600 IT departments.
The aim was to tune the network monitoring software closer to the needs of the administrators.
The result of the survey: over 95% of the participants would recommend PRTG - or already had.

Recommend PRTG

 

PRTG The Swiss Army knife

PRTG: The Swiss Army knife for sysadmins

Adapt PRTG individually and dynamically to your needs relying on a strong API:

  • HTTP API: Access monitoring data and manipulate monitoring objects using HTTP requests
  • Custom Sensors: Create your own sensors for customized monitoring
  • Custom Notifications: Create your own notifications to send alarms to external systems
  • REST Custom Sensor: Monitor almost everything that provides XML or JSON

 

Still not convinced?

 

 

More than 500,000 sysadmins love PRTG

PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.

Still not convinced?

 

Monitor your entire IT infrastructure

Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.

 

 

 

Free Download

 

 

Try PRTG for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free. Start now with your 30-day trial.

 

 

PRTG

Network Monitoring Software - Version 22.2.76.1705 (April 26th, 2022)

Hosting

Download for Windows and cloud-based version PRTG Hosted Monitor available

Languages

English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese

Pricing

Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

Supported Vendors & Applications

More
cisco logo grey 40 dell logo grey 40 hp logo grey 40 ibm grey40 netapp grey40 linux grey40 aws grey40 windows grey40 vmware grey40 citrix grey40 exchange grey40 apache grey40 oracle grey40