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Cisco Unified Communications Manager Administration Guide
OL-18611-01
Chapter 2 Server Configuration
Configuring a Server
Configuring a Server
This section describes how to add or update a server address to the Cisco Unified Communications
Manager database.
Before You Begin
Before you configure a server, review the following information:
• Make sure that you only add each server once on the Server Configuration window. If you add a
server by using the host name and add the same server by using the IP address, Cisco Unified
Communications Manager cannot accurately determine component versions for the server after a
Cisco Unified Communications Manager upgrade. If you have two entries in Cisco Unified
Communications Manager Administration for the same server, delete one of the entries before you
upgrade (see the
“Deleting a Server” section on page 2-6).
• When you perform a fresh installation of Cisco Unified Communications Manager, you must define
any subsequent servers (nodes) in the Cisco Unified Communications Manager Administration
Server Configuration window before you can install Cisco Unified Communications Manager on
each subsequent server. To define a subsequent node, click Add New and perform the procedure in
the
“Configuring a Server” section on page 2-5. After you add the subsequent server, you can then
install the Cisco Unified Communications Manager software on that server.
• If you use IPv4 in your network, you must update the DNS server with the appropriate Cisco Unified
Communications Manager name and address information before you use that information to
configure the Cisco Unified Communications Manager server.
Caution If your network supports IPv6 or IPv4 and IPv6 in dual-stack mode, you can provision your
DNS server for IPv6 prior to upgrading from Cisco Unified Communications Manager
Release 7.0(1) to Release 7.1(2). However, do not configure the DNS records for Cisco
Unified Communications Manager for IPv6 until after you upgrade to Release 7.1(2).
Configuring the DNS records for Cisco Unified Communications Manager for IPv6 prior to
upgrading to Release 7.1(2) causes the upgrade to fail and causes your system to become
nonfunctional after you reboot.
• For DNS, make sure that you map the IP addresses of all servers, including dummy nodes, to the
host names on the DNS server. If you do not perform this task, Cisco Unified Communications
Manager generates alarms that inform you that the License Manager service is down.
• Cisco Unified Communications Manager Administration does not prevent you from updating the IP
Address field under any circumstances.
• When you attempt to change the IP address in the Server Configuration window, the following
message displays after you save the configuration: “Changing the host name/IP Address of the
server may cause problems with Cisco Unified Communications Manager. Are you sure that you
want to continue?” Before you click OK, make sure that you understand the implications of updating
this field; for example, incorrectly updating this setting may cause Cisco Unified Communications
Manager to become inoperable; that is, the database may not work, you may not be able to access
Cisco Unified Communications Manager Administration, and so on. In addition, updating this field
without performing other related tasks may cause problems for Cisco Unified Communications
Manager.
• Changes to the server configuration do not take effect until you restart Cisco Unified
Communications Manager. For information about restarting the Cisco CallManager service, refer to
the Cisco Unified Serviceability Administration Guide.