Windows 7 / Networking


IPConfig (Ipconfig.exe) is a useful command-line tool for troubleshooting problems with automatic configuration such as Dynamic Host Configuration Protocol (DHCP). You can use IPConfig to display the current IP configuration, identify whether DHCP or Automatic Private IP Addressing (APIPA) is being used, and release and renew an automatic IP configuration.

To view detailed IP configuration information, open a command prompt and run the following command.

ipconfig /all

This command displays the current IP configuration and produces output.

To determine whether DHCP addressing was successful, open a command prompt and run the following command.


This command produces output similar to the following.

Windows IP Configuration

Ethernet adapter Local Area Connection:

 Connection-specific DNS Suffix .  :
 Link-local IPv6 Address	   : fe80::9477:c944:e7dc:bb4f%14
 Autoconfiguration IP Address. . . :
 Subnet Mask . . . . . . . . . . . :
 Default Gateway . . . . . . . . . :

If the IP address shown is in the range from through, Windows used APIPA because the operating system was unable to retrieve an IP configuration from a DHCP server upon startup, and there was no alternate configuration. To confirm this, examine the IPConfig output for the DHCP Enabled setting without a DHCP server address.

To release and renew a DHCP-assigned IPv4 address, open a command prompt with administrative credentials and run the following commands.

ipconfig /release
ipconfig /renew

Windows will stop using the current IPv4 address and attempt to contact a DHCP server for a new IPv4 address. If a DHCP server is not available, Windows will either use the alternate configuration or automatically assign an APIPA address in the range of through

To release and renew an automatically assigned IPv6 address, open a command prompt and run the following commands.

ipconfig /release6
ipconfig /renew6
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In this tutorial:

  1. Troubleshooting Network Issues
  2. Tools for Troubleshooting
  3. Table-1 Network Troubleshooting Tools
  4. Arp
  5. How to Identify a Problem with the ARP Cacher
  6. How to Clear the ARP Cache
  7. Event Viewer
  8. IPConfig
  9. Nblookup
  10. Nbtstat
  11. Net
  12. How to View Shared Folders on the Local Computer
  13. How to View Shared Folders on Another Computer
  14. Netstat
  15. Network Monitor
  16. Nslookup
  17. Verifying that the Default DNS Server Resolves Correctly
  18. Verifying that a Specific DNS Server Resolves Correctly
  19. Verifying Specific Types of Addresses
  20. Using TCP for DNS Lookups
  21. PathPing
  22. PathPing Output
  23. Routing Loops
  24. Performance Problems
  25. Possible Connectivity Issues
  26. No Connectivity Issues
  27. Performance Monitor
  28. Data Collector Sets
  29. Windows Resource Monitor
  30. Ping
  31. PortQry
  32. Identifying the TCP Port for a Service
  33. Windows 7 Testing Service Connectivity
  34. Determining Available Remote Management Protocols
  35. Why PortQry Is Great
  36. Route
  37. Task Manager
  38. TCPView
  39. Telnet Client
  40. Testing Service Connectivity
  41. Test TCP
  42. Windows Network Diagnostics
  43. The Process of Troubleshooting Network Problems
  44. How to Troubleshoot Network Connectivity Problems
  45. How to Troubleshoot Application Connectivity Problems
  46. Default Port Assignments for Common Services and Tasks
  47. How to Troubleshoot Name Resolution Problems
  48. How to Verify Connectivity to a DNS Server
  49. How to Use the Hosts File
  50. How to Troubleshoot Performance Problems and Intermittent Connectivity Issues
  51. How to Troubleshoot Joining or Logging on to a Domain
  52. How to Verify Requirements for Joining a Domain
  53. How to Troubleshoot Network Discovery
  54. How to Troubleshoot File and Printer Sharing
  55. How to Troubleshoot File and Printer Sharing from the Client
  56. How to Troubleshoot File and Printer Sharing from the Server
  57. How to Troubleshoot Wireless Networks
  58. Network Diagnostics
  59. How to Troubleshoot Firewall Problems