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How can I monitor a device with dynamic IP address ?

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We use PRTG for monitoring our network devices but we are facing problem monitoring access points which are getting IP address form DHCP.

Everytime we have a change in IP , PRTG shows them down.

How can we resolve this problem in PRTG ?

access-point dynamic prtg

Created on Apr 28, 2017 11:22:46 AM by  jaytanwar (0) 1



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Hi there,

The best way would be to set hostnames/DNS names for each of the access points, for example "AP01.domain.local, AP02.domain.local, AP03.domain.local...". Afterwards add these DNS names to the device settings in PRTG. Should the IP change of the Access Points, then PRTG will still be able to monitor them via the DNS name.

Best regards.

Created on Apr 28, 2017 1:51:48 PM by  Dariusz Gorka [Paessler Support]

Last change on May 2, 2017 9:10:55 AM by  Luciano Lingnau [Paessler Support]



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We use Cisco Prime for now to monitor AP with dynamic IP. The problem with prime is it does not give availability report where we can select a period (Ex- 1 MARCH TO 1 APRIL etc).

Cisco prime is capable to detect any change in IP address because it takes data from cisco wireless controller.

Can PRTG talk with cisco prime on hostname basis and ask for the IP and then monitor it ?

Created on Apr 28, 2017 3:49:09 PM by  jaytanwar (0) 1



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Thank you for your reply.

PRTG is only designed to work with DNS, which is the standard for name/ip resolution. If you use DNS Names in PRTG it will poll your DNS Server on a regular basis to make sure it's monitoring the correct address.

However, you could still consider the following:

  1. Create a script/task/cronjob that polls the Cisco Prime and creates an according DNS zone which you can use for PRTG.
  2. Create a script/task/cronjob that updates any IP changes to PRTG, you can set the new address using PRTG's API. To understand how this works please refer to:

Best Regards,
Luciano Lingnau [Paessler Support]

Created on May 2, 2017 9:14:29 AM by  Luciano Lingnau [Paessler Support]

Last change on May 2, 2017 9:14:50 AM by  Luciano Lingnau [Paessler Support]



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Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.