following information carefully before you proceed with the installation:
DNS configuration and domain fields are mandatory for Unified CCX
installation. Both forward and reverse lookups are required. DNS is required
for the VoIP Monitor Subsystem and Unified CCX Chat feature to function and for
integration with ICM by hostname in Unified IP IVR.
When you Install Unified CCX on an existing server formats the
hard drive, it overwrites all existing data on the drive. It also upgrades the
system BIOS, firmware, and Redundant Array of Inexpensive Disks (RAID)
configuration if they are outdated.
Ensure that you connect each Unified CCX node to an
uninterruptible power supply (UPS) to protect the Unified CCX server from
unexpected power failure that damages the physical media.
All servers in
a cluster must run the same release of Unified CCX. The only exception is while
upgrading cluster software, during which a temporary mismatch is allowed.
server by using a static IP address so that the server IP address remains
attempt to perform any configuration tasks during the installation.
Be aware that
the field values (namely hostname and passwords) that you enter while you are
running the installation program are case sensitive.
insert or remove a USB drive, you might see error messages on the console
assuming drive cache: write through." You can safely ignore these messages.
If the system time is from an Network Time Protocol (NTP) server (mandatory
for VMware deployments), verify that the first node synchronizes with the NTP server before you install a
If the first node fails to synchronize with an NTP server, installation of a second node also fails.
If the firewall is in the routing path, disable the firewall
between nodes. Increase the firewall timeout settings until
you complete the installation.
Record the network interface card (NIC) speed and duplex settings of the switch port to which you will connect the new server.
Enable PortFast on all switch ports that are connected to Cisco
Do not run Network Address Translation (NAT) or Port Address
Translation (PAT) between
Unified CCX nodes.