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Design Guide for Cisco Unity Release 5.x
OL-14619-01
Chapter 3 Network Infrastructure Requirements
Availability of Network Resources
• Administrators access the Cisco Unity Administrator from other servers, which is primarily done
when using the administrative web interfaces. Typically, if a server name is used instead of an IP
address, the server name must be resolved to an IP address before access can occur over the network.
• Subscribers access the Cisco Unity Assistant or the Cisco Unity Inbox. Typically, if a server name
is used instead of an IP address, the server name must be resolved to an IP address before access can
occur over the network.
The Cisco Unity server must use Dynamic DNS (DDNS) or another version of DNS that supports
dynamic updates as described on the Microsoft website. Simply creating a host file on the Cisco
Unity
server is not sufficient.
When Domino is the message store, note the following:
• If Notes clients are using Notes Name Resolution, Cisco Unity must also use Notes Name
Resolution through the Notes client that is installed on the Cisco
Unity server. DDNS is required on
the Windows domain controller in the domain to which the Cisco
Unity server belongs.
• You can install the Windows DNS service on the Cisco Unity server in either a Unified Messaging
or a Voice Messaging configuration. With Domino, the Cisco
Unity server is configured as a
Windows domain controller to service Domino Notes clients via DUC. This is a Cisco
Unity
requirement, not a DUC requirement. The Cisco
Unity server supports its own dedicated domain for
Domino.
When Exchange is the message store, note the following:
• The DDNS server must be accessible by Cisco Unity and the supporting Exchange servers.
• In a Voice Messaging configuration with failover, install the Windows DNS service on the
Cisco
Unity secondary failover server or on a dedicated DC/GC server.
• In a Voice Messaging configuration without failover, when the Cisco Unity server is a Windows
domain controller and all other servers in the domain are Exchange servers that are used only to
support Cisco
Unity, install the Windows DNS service on the Cisco Unity server. In this
configuration, the Cisco
Unity server supports its own dedicated domain for Exchange.
• In a Unified Messaging configuration when Exchange is the message store, do not install the
Windows DNS service on the Cisco
Unity server.
Domain Controller Access and Availability
For all configurations and all message stores, Cisco Unity must have access to a Windows domain
controller to authenticate service accounts and, when Exchange is the message store, to authenticate
subscribers.
When Domino is the message store, subscribers can be authenticated for GUI-based access to
Cisco
Unity by using either Windows authentication or Domino authentication; Domino authentication
does not require access to a Windows domain controller.
Availability of Message Store Servers
When Cisco Unity is installed, the installer specifies one Domino or Exchange server that Cisco Unity
connects with; this is known as the partner Domino server or the partner Exchange server. The partner
server is the home of the Cisco
Unity system mailbox (alias: Unity_<ServerName>. The Unity system
mailbox is the mailbox that originates voice messages from outside callers. The partner server is also the
home for default mailboxes and distribution groups (Cisco
Unity distribution lists) that are created