// Documentation
Guides & documentation
Step-by-step walkthroughs for every VirtualBytes tool — what they do, how to use them, common inputs and outputs, and examples. Skim the quick-start at the top of each guide, or dive into the reference sections for details.
Pre-deployment & planning
VCF JSON Builder
Build, validate, and export a VCF 9 deployment JSON spec for the VCF Installer. Production & PoC modes, storage options, NSX cluster, Operations & Automation.
VCF Pre-Deployment Checklist
Interactive checklist covering DNS, NTP, networking, hardware, licensing, certificates, and firewall ports before starting a VCF install.
VCF Upgrade Path Advisor
Find the correct upgrade sequence from your current VCF version to target across 4.x, 5.x, and 9.x.
VCF Host Sizing Calculator
Calculate cluster host requirements based on workload vCPU, memory, and storage with N+1/N+2 headroom.
Networking & infrastructure
IP Subnet Planner
VLSM subnet calculator with overlap validation for VCF management, vMotion, vSAN, and NSX TEP networks.
MTU Path Calculator
Calculate effective MTU across GENEVE and VXLAN overlay paths. Spot mismatches that cause silent drops.
VLAN Allocation Planner
Design your full VLAN range with 9 VCF templates, conflict detection, and multi-vendor switch config export.
DNS Zone Designer
Design forward and reverse DNS zones for VCF deployments. Export BIND zone files or Windows DNS PowerShell.
VCF Network Config Generator
Generate production-ready switch configs for L3 gateways, ESXi trunks, jumbo MTU, and BGP peering.
Design & architecture
VCF Reference Architecture Builder
Drag-and-drop VCF topology designer across logical, physical, and storage layers with VCF 9 validation and vendor switch config export.
Rack Power & Cooling Calculator
Calculate rack power draw, BTU/hr cooling load, PDU sizing, and circuit breakers. Supports 120V/208V/230V/240V, N/N+1/2N redundancy, and PUE overhead.
vSAN Capacity Calculator
Calculate usable vSAN capacity with OSA/ESA, FTT policies, slack space, and dedup/compression.
NSX Segment & T1 Gateway Planner
Design NSX overlay and VLAN-backed segment topology with T1 gateways, DHCP, and Terraform/PowerCLI export.
NVMe Memory Tiering Calculator
Plan NVMe memory tiering for VCF 9 with Mem.TierNVMePct, active memory fit, and per-VM tiering exclusions.
Day 2 operations
VCF Day 2 Operations Planner
Step-by-step runbooks for cluster expansion, cert rotation, password rotation, vSAN expansion, NSX segments, and host replacement.
ESX CLI Quick Reference
Searchable command reference for esxcli, vim-cmd, esxcfg, dcli, and nsxcli. 170+ commands with risk indicators and workflow-based organization.