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Home > Success Center > IP Address Manager (IPAM) > IPAM - Knowledgebase Articles > Disabling LLMNR in an IPAM deployment

Disabling LLMNR in an IPAM deployment

Updated March 21, 2018


This article describes how disabling Link-Local Multicast Name Resolution (LLMNR) impacts IP Address Manager (IPAM). 


  • All IPAM versions
  • Microsoft® Windows Vista®
  • Microsoft Windows Server® 2008


LLMNR resolves single label names (such as Computer1) on the local subnet when DNS is unable to resolve the name.  This is helpful if you are in an ad-hoc network where DNS entries do not include hosts on the local subnet.

Enable LLMNR

To enable LLMNR in your network, enable Network Discovery on all nodes in the local subnet. In Microsoft® operating systems, Network Discovery and LLMNR functionality are only included with Windows® Vista and Windows Server® 2008.

Disable LLMNR

You can disable LLMNR by setting the following Group Policy value:

Group Policy = Computer ConfigurationAdministrative TemplatesNetworkDNS 
ClientTurn off Multicast Name Resolution. 
(Enabled = Don’t use LLMNR, Disabled = Use LLMNR)

The impact on IPAM depends on your environment and whether you can replace LLMNR with another method (such as DNS, local host file, or NetBIOS) to resolve hostnames. 


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