/mcp• When creating the OS Administrator ID, ensure that it does not start with “uccx” or “UCCX” because such IDs conflict with system account names that are used internally within the Contact Center Express server. Ensure that the OS Administration password is at least six characters long; it can contain alphanumeric characters, hyphens, and underscores. • Ensure that the Application User password is at least six characters long; it can contain alphanumeric characters, hyphens, and underscores. Preinstallation Tasks Step 1 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 second node. If the first node fails to synchronize with an NTP server, installation of a second node also fails. Note Step 2 If the firewall is in the routing path, disable the firewall between nodes. Increase the firewall timeout settings until you complete the installation. Step 3 Record the network interface card (NIC) speed and duplex settings of the switch port to which you will connect the new server. Step 4 Enable PortFast on all switch ports that are connected to Cisco servers. Do not run Network Address Translation (NAT) or Port Address Translation (PAT) between Unified CCX nodes. Caution Step 5 If you choose to apply a patch during installation, use a Secure File Transfer Protocol (SFTP) server that is certified by Cisco through the Cisco Technology Developer Partner program (CTDP). For more information about Supported SFTP Servers, see System Requirements section in Cisco Unified Contact Center Express Admin and Operations Guide. Cisco Unified Contact Center Express Install and Upgrade Guide, Release 12.5(1) SU3 4 Installation Preparation Preinstallation Tasks