Installing and setting up the second DNS server 2008 R2
Domain Name System (DNS) design specifications recommend that at least two DNS servers be used to host each zone. For standard, primary zones, a secondary server is required to add and configure the zone so that it appears to other DNS servers in the network. For directory-integrated, primary zones, secondary servers are supported but not required for this purpose. For example, two DNS servers running on domain controllers can be redundant primary servers for a zone. They can provide the same benefits as adding a secondary server while also providing additional benefits.
Connecting to the primary DNS from the DNS manager
The primary tool that you use to manage DNS servers is DNS Manager, the DNS snap-in in Microsoft Management Console (MMC), which appears as DNS in Administrative Tools on the Start menu. You can use DNS Manager along with other snap-ins in MMC, further integrating DNS administration into your total network management. It is also available in Server Manager on computers with the DNS Server role installed. Membership in the Administrators group, or equivalent, is the minimum required to complete this procedure.
Creating forward lookup zones and zone type (standard secondary)
A forward lookup zone is a DNS zone in which hostname to IP address relations are stored. When a computer requests the IP address of a specific hostname, the forward lookup zone is queried and the result is returned. A secondary zone is a read-only copy of the zone that was copied from the master server during zone transfer. In fact, a standard secondary zone can only be updated through zone transfer. Also, it is possible to have secondary forward lookup zones when using active directory integrated DNS.