The Name Specified In Network Control Block (NCB) Is In Use On A Remote Adapter Posted on by Webmaster IT Support Forum › Forums › Active Directory › DHCP › Troubleshooting › The Name Specified In Network Control Block (NCB) Is In Use On A Remote Adapter This topic contains 0 replies, has 1 voice, and was last updated by Webmaster 2 years ago. Author Posts May 23, 2016 at 1:58 pm #1853 WebmasterKeymaster When you try to renew your IP address, you get this error: Windows IP Configuration An error occurred while renewing interface Ethernet : The name specified in the network control block (NCB) is in use on a remote adapter. The NCB is the data. This issue is caused by one of the following: The subnet of the DHCP server is different to the subnet of the addresses it’s putting out and there is no DHCP relay to connect the subnets A firewall is blocking the DHCP requests or a network issue is preventing the DHCP server from connecting to the DHCP client The DHCP server is trying to give out IP addresses from scopes that overlap I have to say that the name specified in the network control block (NCB) is in use on a remote adapter error is probably one of the most unusual errors I’ve ever had to fix. Author Posts You must be logged in to reply to this topic.