FortiManager 3100G
Centralized management for up to 4,000–8,000 devices and VDOMs
- Devices / VDOMs
- 4,000–8,000
- Sustained log rate
- 150 logs/sec
- GB / day
- 10
The FortiManager 3100G manages up to 4,000–8,000 devices and VDOMs with a sustained log rate of 150 logs/sec and 10 GB/day of log throughput. Policy packages, provisioning templates, firmware rollout and a full change-approval workflow with revision history and rollback.
Four to eight thousand devices and VDOMs, with the log rate tripling to 150/sec and storage to 16x 4 TB, the first model built to carry meaningful logging alongside management. The range on the device limit is not a typo: effective capacity depends on how much of it is VDOMs rather than physical devices, which is exactly the sizing conversation to have before ordering.
How to work out whether it fits
The arithmetic a datasheet leaves out. If any of it does not match your situation, that is worth a call rather than a guess.
The four-to-eight-thousand range is not vagueness, it reflects how much of the count is VDOMs rather than physical devices. Establish your ratio before ordering. The tripled log rate and 16x 4 TB of storage also mean this can carry meaningful logging alongside management, but check that against a dedicated FortiAnalyzer on cost before deciding to consolidate the two roles.
What to order alongside the FortiManager 3100G
The published threat protection figure for this model is measured with IPS, application control and malware protection all running. Those arrive as a FortiGuard subscription, so the bundle you choose decides whether the hardware can reach the number you sized it on. Every bundle already includes FortiCare Premium 24x7 support.
| Bundle | What it adds | 1 yearlist price | 3 yearslist price | 5 yearslist price |
|---|---|---|---|---|
| Enterprise ProtectionENT | The broadest bundle. Everything in UTP, plus the services that cover data, SaaS posture and attack-surface visibility, plus inline zero-day malware prevention. | on quote | on quote | on quote |
| Unified Threat ProtectionUTP | The traditional mid-tier: perimeter defence covering network, file, web and email threats. Everything most sites actually switch on. | on quote | on quote | on quote |
| Advanced Threat ProtectionATP | The narrow bundle: IPS and the full malware stack including cloud sandboxing, without the web and email filtering layers. | on quote | on quote | on quote |
These are Fortinet list prices. You will not pay them.
Every quote we write is discounted from list, and how far below depends on quantity, term and whether we register the deal with Fortinet. Longer terms also price better per year, which is why three and five year bundles are usually the better buy on a device you intend to keep through a refresh cycle. Part numbers follow Fortinet’s standard bundled convention; not every model carries every combination, so we confirm the exact orderable SKU before anything is placed.
Highlights
- Manages up to 4,000–8,000 devices and VDOMs
- Policy packages and shared object database across the estate
- Full change-approval workflow with revision history and rollback
- ADOMs give per-tenant administrative separation for service providers
Typical deployments
- Very large multinational estates
- Service providers with thousands of managed customer devices
- Deployments combining management and substantial log retention
What this includes
Fortinet publishes no throughput table for this product; it is licensed per user, endpoint, workload or account. What follows is capability and sizing, not benchmarks.
Capacity
Managed-device capacity counts devices and VDOMs together.
| Devices / VDOMs (maximum) | 4,000–8,000 |
|---|---|
| Sustained log rate (logs/sec) | 150 |
| GB / day | 10 |
Hardware
| Total interfaces | 2x GE RJ45, 2x 25GE SFP28 |
|---|---|
| Storage capacity | 16x 4 TB |
Sources
- Fortinet Product Matrix (July 2026), retrieved 2026-09-01
- Fortinet Partner Portal price list, retrieved 2026-09-01
Reproduced from Fortinet published documentation and subject to change without notice. Where a figure is load-bearing for your design, ask us to confirm it in writing before you order; we will.