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How to Configure the DNS TTL Value for a Clustered Mailbox Server Network Name Resource

 

Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1

Topic Last Modified: 2008-02-15

This topic explains how to use Cluster.exe to set the Domain Name System (DNS) Time to Live (TTL) value for a clustered mailbox server's Network Name resource. The DNS TTL value for this resource should be set to 5 minutes (300 seconds) when deploying a clustered mailbox server in a multiple subnet environment, or when using a standby cluster in a recovery operation that involves changing the clustered mailbox server's IP address.

noteNote:
In most environments, we recommend setting the DNS TTL value only for the clustered mailbox server Network Name resource. However, in environments with non-Exchange management tools that connect to the cluster by its name for management purposes, we recommend setting a TTL value of 5 minutes for the cluster's Network Name resource, as well.

To perform this procedure, the account you use must be delegated the following:

  • Membership in the local Administrators group on both nodes in the cluster

  • Full control permissions for the cluster

For more information about permissions, delegating roles, and the rights that are required to administer Microsoft Exchange Server 2007, see Permission Considerations.

  1. Open a Command Prompt window.

  2. Run the following command:

    cluster.exe res <CMSNetworkNameResource> /priv HostRecordTTL=300
    
  3. Take the clustered mailbox server offline by using the Stop-ClusteredMailboxServer cmdlet in the Exchange Management Shell, or by using the Manage Clustered Mailbox Server wizard in the Exchange Management Console.

  4. Bring the clustered mailbox server online by using the Start-ClusteredMailboxServer cmdlet in the Exchange Management Shell, or by using the Manage Clustered Mailbox Server wizard in the Exchange Management Console.

For more information about cluster continuous replication (CCR), see Cluster Continuous Replication and Installing Cluster Continuous Replication on Windows Server 2008.

 
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