To download the Cisco Custom ISO for VMware ESXi, you must Broadcom Support Portal
Before installing ESXi, run the Cisco HUU to upgrade the server’s firmware (BIOS, CIMC, adapter firmware). The ESXi custom ISO expects specific firmware levels. Mismatched firmware = degraded performance. vmware esxi cisco custom iso top download
Stability: Custom ISOs are tested and certified by both VMware and Cisco to ensure they meet the Hardware Compatibility List (HCL) requirements. To download the Cisco Custom ISO for VMware
Follow Prompts: The ESXi installer will load with all Cisco drivers pre-loaded. Troubleshooting Common Issues Create an account on the Cisco website :
If you need a specific patch level not provided in the pre-built ISO, you can create one manually: Cisco custom ESXi Images | VMware vSphere
Last updated: October 2025. This guide reflects the latest VMware vSphere 8 and Cisco UCS Manager 4.3 software stacks.