Windows 7 / Networking

Understanding Name Registration

DNS servers running Windows Server 2003 can dynamically register both A and AAAA records for clients running Windows 7. Dynamic registration of DNS records simplifies the job of maintaining name resolution on networks running the Active Directory Directory Service. When a client running Windows 7 starts up on a network, the DNS Client service tries to register the following records for the client:

  • A records for all IPv4 addresses assigned to all interfaces configured with the address of a DNS server
  • AAAA records for all IPv6 addresses assigned to all interfaces configured with the address of a DNS server
  • PTR records for all IPv4 addresses assigned to all interfaces configured with the address of a DNS server

Note AAAA records are not registered for link-local IPv6 addresses that have been assigned to interfaces using address autoconfiguration.

By default, DNS servers running Windows Server 2003 do not listen for DNS traffic sent over IPv6. To enable these DNS servers to listen for IPv6 name registrations and name lookups, you must first configure the servers using the dnscmd /config /EnableIPv6 1 command. By default, DNS servers running Windows Server 2008 listen for DNS traffic sent over IPv6. You must then configure each client running Windows 7 with the unicast IPv6 addresses of your DNS servers using DHCPv6, the properties of IPv6 (TCP/IPv6) in the Network Connections folder, or the netsh interface ipv6 add dns interface=NameOrIndex address=IPv6Address index=PreferenceLevel command where PreferenceLevel specifies the index for the specified DNS server address. (DHCP servers running Windows Server 2003 do not support stateful address assignment using DHCPv6.)

Note For further details on the DNS name query and registration behavior in Windows 7 and Windows Vista, see the article titled "Domain Name System Client Behavior in Windows Vista" on Microsoft TechNet at http://technet.microsoft.com/en-us/library/bb727035.aspx.

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In this tutorial:

  1. Deploying IPv6
  2. Understanding IPv6
  3. Understanding IPv6 Terminology
  4. Understanding IPv6 Addressing
  5. Understanding IPv6 Prefixes
  6. Understanding IPv6 Address Types
  7. Understanding Unicast Addresses
  8. Identifying IPv6 Address Types
  9. Understanding Interface Identifiers
  10. Comparing IPv6 with IPv4
  11. Understanding IPv6 Routing
  12. How IPv6 Routing Works
  13. IPv6 Route Determination Process
  14. IPv6 Routing Table Structure
  15. Understanding ICMPv6 Messages
  16. Understanding Neighbor Discovery
  17. Understanding Address Autoconfiguration
  18. Understanding Name Resolution
  19. Understanding Name Queries
  20. Understanding Name Registration
  21. PTR Records and IPv6
  22. IPv6 Enhancements in Windows 7
  23. Summary of IPv6 Enhancements in Windows 7
  24. Configuring and Troubleshooting IPv6 in Windows 7
  25. Configuring IPv6 in Windows 7 Using the User Interface
  26. Configuring IPv6 in Windows 7 Using Netsh
  27. Other IPv6 Configuration Tasks
  28. Enabling or Disabling IPv6
  29. Disabling Random Interface IDs
  30. Resetting IPv6 Configuration
  31. Displaying Teredo Client Status
  32. Troubleshooting IPv6 Connectivity
  33. Planning for IPv6 Migration
  34. Blocking Teredo
  35. Understanding ISATAP
  36. Migrating an Intranet to IPv6
  37. Step 1: Upgrading Your Applications and Services
  38. Step 2: Preparing Your DNS Infrastructure
  39. Step 3: Upgrading Your Hosts
  40. Step 4: Migrating from IPv4-only to ISATAP
  41. Step 5: Upgrading Your Routing Infrastructure
  42. Step 6: Upgrading Your DHCP Infrastructure
  43. Step 7: Migrating from ISATAP to Native IPv6
  44. The Advantages of IPv6
  45. Address Resolution in IPv6