/mcp© 2026 Cisco and/or its affiliates. All rights reserved. Page 22 of 34 o Each disk SAS 10kbps (15kbps recommended). The following are not recommended because they tend to be too slow: SATA disks and SAS disks with < 10 kbps. RAID6 o One HDD per physical CPU core, with 4-8 disks per RAID6 array (more disks per volume are discouraged due to slowed write times vs. many Cisco Collaboration applications are write-intensive). o Each disk is SAS with a minimum of 15K rpm. Otherwise, same guidelines as for RAID5. RAID10 o One HDD per 2 physical CPU cores, with at least 4 disks per RAID10 array o Each disk same as the RAID5 recommendation. o 3rd-party SAN/NAS arrays: o Make sure the SAN/NAS used is listed by Broadcom as compatible for the ESXi release being used, and listed as supported by the compute vendor. o Network planning must include both vDisk storage traffic and vnic network traffic. o Follow hardware vendors’ guidance for compatibility and meeting application latency and IOPS requirements. o Hyperconverged environments: o Cisco Compute Hyperconverged with Nutanix. o AOS is the hyperconvergence software. o Network planning must include both vdisk storage traffic and vnic network traffic. o Follow AOS and hardware vendor guidance for compatibility and meeting application latency and IOPS requirements. o VM Placement needs to factor in a required Controller VM on each server. Specifications of this VM depend on AOS cluster sizing. Network Requirements General ● If Cisco Calling Appliance is selected, the network hardware is selected by default in the appliance model (no changes are supported). For more details, see Install Guide of each appliance. ● For Cisco General-purpose and 3rd-party General-purpose hardware, must follow: o Network adapters are defined as all NICs, HBAs, VICs, etc., used for the server to access the network for LAN access or storage access. If storage is SAN, NAS, or HCI, then network planning must include both vDisk storage traffic and vNIC network traffic. o Make sure all network adapters used are listed by Broadcom as compatible for the ESXi release being used, and listed as supported by the compute/storage vendors.