McDewey

vNIC vDisk vRAM Physical CPU Required Minimum Base Frequency vCPU Component and Capacity Point 1 (1GbE+) 2x 80GB 14 GB 2.50+ GHz 4 Medium (15,000 devices) 1 (1GbE+) 2x 80GB 18 GB 2.50+ GHz 6 Large (25,000 devices) Table 4: Session Management Edition Release 15 FCS through 15SU4 vNIC vDisk vRAM Physical CPU Required Minimum Base Frequency vCPU Component and Capacity Point 1 1x 110 GB 12 GB 2.50 GHz 2 Medium VM 1 1x 110 GB 14 GB 2.50 GHz 4 Large VM Platform Requirements This section provides information about the platform requirements that you must meet before you can deploy Unified Communications Manager and the IM and Presence Service on virtual machines. In this release, you cannot install or run Unified Communications Manager and the IM and Presence Service directly on server hardware; you must run these applications on virtual machines. Before you can install or direct migrate the software on a virtual machine, you must: • Install and configure physical hardware. • Install and configure the virtualization software. • Deploy a virtual machine from the correct Cisco provided OVA file for the release. • Depending on the installation method used, additional steps are required. All methods require the correct Cisco-provided bootable ISO installation file for the release. Subnet Limitations Do not install Unified Communications Manager in a large Class A or Class B subnet that contains a large number of devices. For more information, see Cisco Collaboration System 12.x Solution Reference Network Designs (SRND). IP Address Requirements A complete collaboration solution relies on DNS in order to function correctly for a number of services and thus requires a highly available DNS structure in place. If you have a basic IP telephony deployment and do Installation Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs 17 Planning the Installation Subnet Limitations