How many vCPUs and how much RAM are recommended to run the vSmart controller on the KVM server for 251 to 1000 devices in software version 20.4.x?

While 16 GB RAM is appropriate, 4 vCPUs might be insufficient for a vSmart controller managing up to 1000 devices in this specific software version, potentially leading to performance bottlenecks.

Cisco SD-WAN documentation provides specific resource recommendations for controllers based on the number of managed devices and software version. For a vSmart controller managing 251-1000 devices in software version 20.4.x, the recommended KVM specifications are typically 8 vCPUs and 16 GB of RAM to handle the control plane load efficiently.

4 GB of RAM is generally insufficient for a vSmart controller managing a medium-to-large number of devices (251-1000), even with 8 vCPUs, as control plane operations can be memory-intensive.

Both 2 vCPUs and 4 GB of RAM are insufficient for a vSmart controller managing 251 to 1000 devices, which would likely result in severe performance degradation and instability.