Start with the right OVA. Overprovision disk slightly. Reserve memory. Use fast storage. And for the love of dial tone, stay on the HCL.
Give subscribers more resources if call volume is high. Keep publishers lean but stable. cucm hardware requirements
Have a CUCM hardware horror story or a question about a specific server model? Drop a comment below—let’s help each other avoid downtime. Start with the right OVA
The storage backend must meet specific Input/Output Operations Per Second to handle database writes. Critical Performance Factors Use fast storage
Although often categorized separately from "hardware," the Network Interface Cards (NICs) and the host server’s Real-Time Clock (RTC) are vital hardware components. CUCM requires network cards that support Gigabit Ethernet speeds. In a hardware redundancy scenario, two physical NICs are required to separate the signaling traffic from the database replication traffic, ensuring that a backup server can take over instantly during a primary node failure.