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Home > Success Center > IP Address Manager (IPAM) > IPAM - Knowledgebase Articles > DHCP Scanning failed with error - there are no more endpoints available from the endpoint mapper

DHCP Scanning failed with error - there are no more endpoints available from the endpoint mapper

Issue

After adding a new DHCP server, IPAM scan fails with the error message:

DHCP Scanning failed with error. There are no more endpoints available from the endpoint mapper.

Environment

All versions of IPAM

Resolution

Use the Portqry command to verify if the required ports are open. This command troubleshoots connectivity issues in the network. For more information, refer to the Microsoft site.

Cause

This will be an environmental issue where the IPAM server cannot find the DHCP server for authentication. This issue is generally caused by a blocked communication in the network for ports 1024 to 65535 or a network routing issue between the servers. The ports may be blocked by:

  • Hardware firewall
  • Internet connection firewall
  • Third-party firewall software
  • Antivirus software
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