Event ID 4186 — TCP/IP Network Interface Configuration

Updated: January 7, 2009

Applies To: Windows Server 2008 R2

The network configuration interface settings of your computer determine the way in which it communicates with other computers and devices on the network.

Event Details

Product: Windows Operating System
ID: 4186
Source: tcpip
Version: 6.1
Message: No subnet mask was specified for interface %2. This interface and all subsequent interfaces on network adapter %3 cannot be initialized.


Diagnose and repair configuration

Network and Sharing Center includes an automatic diagnostic and repair tool that you can use to repair your network configuration.

To perform this procedure, you must have membership in Administrators, or you must have been delegated the appropriate authority.

To diagnose and repair the TCP/IP configuration:

  1. Click Control Panel, double-click Network and Sharing Center, and then click Manage network connections.
  2. Right-click the interface you want to repair, and then click Diagnose.
  3. This will diagnose any configuration issues and repair them.


To verify that an IP address is assigned:

  1. At the DHCP-enabled client computer, click Start, click Run, and then type cmd.
  2. Type ipconfig /all to view lease-status information.
  3. The output of the ipconfig command should show an IPv4 or IPv6 address marked "preferred."

TCP/IP Network Interface Configuration