Implementation at the server level only applies to newly created scopes. Right-click the l Pv4 or l Pv6 node and then open the Properties dialog box. To enable DHCP Name Protection for an l Pv4 or l Pv6 node: 1. The other computers get no group policies, so you can forget about any carefully-orchestrated centralized management scheme. Imagine what would happen if you asked your users to type Fully Qualified Domain Names (FQDNs) rather than simple flat names to connect to internal servers. Users are willing to type com to buy a used wristwatch, but they don’t want to type \w2k3s102school.edu\ freshman_zclass to map a drive. The domain to which the desktop or server belongs has a DNS name as well as a flat name.DNS servers, however, stubbornly insist that every query specify a target domain. You can see this suffix in the Properties of the local system (Figure 1).FIGURE 4-4 DNS registration You can configure the following options: – Enable DNS Dynamic Updates According To The Settings Below Allows you to configure the DHCP server to only update DNS records when requested by the client (the default value) or to always dynamically update DNS records each time the DHCP server leases an address.– Discard A And PTR Records When Lease Is Deleted Enabled by default, the DHCP server instructs the DNS server to remove any associated host and reverse lookup records when a DHCP lease expires and is deleted.– Dynamically Update DNS Records For DHCP Clients That Do Not Request Updates Ensures that DNS records are always updated when the DHCP server leases an address.This functions in a manner similar to the Always dynamically update DNS records option– Disable Dynamic Updates for DNS PTR Records Configures the DHCP server to update host (A) records, but does not update records in a reverse lookup zone.When a DHCP server leases an address to a client, it can also perform registration of that computer’s address in DNS.DNS registration ensures that the addresses configured in the DNS zone match the IP addresses leased by the DHCP server.
If a query using the primary suffix fails, and the Append Parent Suffixes option is checked, the resolver strips the leftmost element from the primary suffix and tries again. The TCP/IP settings for each network interface can have a unique DNS suffix, populated either statically or with DHCP.You also forget to reconfigure the DHCP scope options so the clients still point at the ISP’s DNS server instead of the new DC. The DC doesn’t register SRV records in the new DNS zone and the clients wouldn’t be able to find them, even if it did. Read the rest of the column for suggestions about resolving Internet names. It accepts the flat name from the user then appends a suffix to form a FQDN it can send to a DNS server.The member computers don’t know that the domain has been upgraded to AD unless they just happen to authenticate at the PDC. Users treat additional keystrokes as if they were penalties visited upon them by uncaring IT bureaucrats. The resolver obtains this DNS suffix from one of several places.DHCP name protection also protects the names from being overwritten by systems that use static addresses that conflict with DHCP-assigned addresses when DHCP is not configured for conflict detection.For example, a UNIX-based system named Client1 could potentially overwrite the DNS address that was assigned and registered by DHCP on behalf of a Windows-based system also named Client1.DHCP Name Protection uses a resource record known as a Dynamic Host Configuration Identifier (DHCID) to track which host originally requested a specific name.The DHCP server provides the DHCID record, which is stored in DNS.Well over 70 percent of all support calls that come to Microsoft support services that start out as Active Directory or Exchange calls end up being DNS calls.Yet, as you’ll see in this article, most of these issues don’t require extensive diagnostic work or sophisticated tools to isolate and resolve.Also, the more experience you have, the more likely you are to make your DNS infrastructure complex, inviting the attention of Mr.Murphy and other elements of chaotic cosmic calamity. Each network interface has a set of TCP/IP settings that lists the DNS servers used by that interface.