What does Windows error code 9851 (DNS_ERROR_NO_TCPIP) mean?

 
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DNS_STATUS_CONTINUE_NEEDED DNS_ERROR_NO_DNS_SERVERS

DNS_ERROR_NO_TCPIP

TCP/IP network protocol not installed.

DNS_ERROR_NO_TCPIP is Win32 error 9851 (0x0000267B).

Likely impact: No DNS server setting can compensate for an unavailable IP protocol stack.

Typical causes

  • TCP/IP components are not installed or are disabled.
  • network stack initialization failed.
  • the operation runs in a restricted recovery image.
  • adapter bindings are corrupted.

Troubleshooting steps

  1. Verify that the system has an operational IP stack and at least one usable network interface for the requested DNS operation.
  2. Collect installed networking components and interface and binding state.
  3. Correlate System and network-service events with the DNS Server event log, DNS analytical logging when enabled, packet capture, zone metadata, server configuration, and the exact DNS API request.

Useful evidence

  • Collect DNS Client service state.
  • Collect a basic socket and resolver test.

Recovery and retry

Restore the Windows TCP/IP networking components and verify local socket operation before retrying DNS.

Related errors

DNS_ERROR_NO_DNS_SERVERS means TCP/IP exists but no DNS servers are configured

Example

A minimal recovery image runs a DNS management task without the networking feature. Adding the required network stack resolves the prerequisite.

References


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