FPR4125-NGFW-K9 – 80G NGFW Firewall – 45G NGFW – 800GB SSD
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FPR4125-NGFW-K9 Description
FPR4125-NGFW-K9 is a Cisco Firepower 4125 NGFW firewall appliance in the Cisco Secure Firewall 4100 Series for Threat Defense deployments at data center, service-provider edge, or high-capacity firewall edge sites. It uses a 1RU Firepower 4100 chassis with eight fixed 1/10G SFP+ data ports, two network module bays for 1G, 10G, 40G, 100G, or hardware-bypass expansion, the Cisco-listed 80G firewall summary tier, 45 Gbps FW + AVC + IPS throughput, 25 million maximum concurrent sessions with AVC, and the 4125 hardware profile with 192 GB memory, 800 GB storage, and dual 1100W AC power supplies.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
FPR4125-NGFW-K9 |
|
Product type |
Cisco Firepower 4125 NGFW appliance |
|
Firewall model |
FPR-4125 |
|
Security software role |
Cisco Secure Firewall Threat Defense / NGFW |
|
Form factor |
1RU |
|
Memory |
192 GB |
|
On-chassis data ports |
8 x 1/10 Gigabit Ethernet SFP+ |
|
Firewall performance summary |
80 Gbps |
|
FW + AVC throughput |
45 Gbps |
|
FW + AVC + IPS throughput |
45 Gbps |
|
IPsec VPN throughput |
19 Gbps |
|
Default power supply |
Two FPR4K-PWR-AC-1100 1100W AC supplies |
|
Fan modules |
6 hot-swappable fans |
Product Performance
Key Features
FPR4125-NGFW-K9 is the Cisco-listed Firepower 4125 NGFW appliance PID, so the quote should stay aligned to a Threat Defense deployment instead of an ASA or NGIPS orderable identity.
The 4125 row raises NGFW and IPS summary figures to 45 Gbps and raises AVC session scale to 25 million, giving buyers a measurable reason to choose it over FPR4115-NGFW-K9.
Cisco lists 800 GB storage for the 4125 and 4145 models, so spare SSD planning should follow the FPR4K-SSD800 path rather than the 400 GB SSD used by lower 4100 models.
The appliance starts with eight fixed 1/10G SFP+ data ports and two network module bays for Cisco-listed 1G, 10G, 40G, 100G, or hardware-bypass module options.
Threat Defense and FXOS compatibility must be checked together before deployment, especially when a BOM includes newer network modules or optics with release-specific support.
Cisco identifies NEBS operation for the FPR-4125 platform, so telecom or controlled-environment sites should keep the exact 4125 platform requirement visible during procurement.
Application Scenarios
Select FPR4125-NGFW-K9 when the firewall design names a Firepower 4125 NGFW appliance and the sizing worksheet points to the 45 Gbps Threat Defense table row.
Use this SKU when the project needs the same 1RU Firepower 4100 hardware class as FPR4115-NGFW-K9 but requires 25 million AVC sessions, 800 GB storage, dual 1100W AC power, or the FPR-4125 NEBS profile.
Choose the 4125 NGFW appliance for a rack plan that begins with eight fixed SFP+ interfaces and needs two network module bays for approved high-speed or hardware-bypass expansion.
Product Comparison
|
Parameter |
FPR4125-NGFW-K9 | ||
|---|---|---|---|
|
Cisco PID description |
Firepower 4125 NGFW appliance |
Firepower 4115 NGFW appliance |
Firepower 4145 NGFW appliance |
|
Default power supply |
Two FPR4K-PWR-AC-1100 1100W AC supplies |
Two FPR4K-PWR-AC-1100 1100W AC supplies |
Two FPR4K-PWR-AC-1100 1100W AC supplies |
|
Firewall model |
FPR-4125 |
FPR-4115 |
FPR-4145 |
|
Security software role |
Threat Defense / NGFW |
Threat Defense / NGFW |
Threat Defense / NGFW |
|
Form factor |
1RU |
1RU |
1RU |
|
Memory |
192 GB |
192 GB |
384 GB |
|
Storage |
800 GB |
400 GB |
800 GB |
|
On-chassis interfaces |
8 x 1/10G SFP+ |
8 x 1/10G SFP+ |
8 x 1/10G SFP+ |
|
Network module bays |
2 |
2 |
2 |
|
Firewall performance summary |
80G |
80G |
80G |
|
NGFW performance summary |
45G |
33G |
53G |
|
IPS performance summary |
45G |
33G |
55G |
|
Maximum concurrent sessions with AVC |
25 million |
15 million |
30 million |
|
Maximum new connections per second with AVC |
269K |
210K |
365K |
|
IPsec VPN throughput |
19 Gbps |
12.5 Gbps |
24 Gbps |
|
Maximum VPN peers |
20000 |
15000 |
20000 |
|
Power supply configuration |
Dual 1100W AC |
Single 1100W AC; dual optional; single or dual 950W DC optional |
Dual 1100W AC |
|
NEBS operation |
Supported on FPR-4125 |
Not the FPR-4125 NEBS model |
Not the FPR-4125 NEBS model |
- In a FPR4125-NGFW-K9 vs FPR4115-NGFW-K9 comparison, both use the 1RU Firepower 4100 NGFW appliance format, but FPR4125-NGFW-K9 moves to 45G NGFW, 25 million AVC sessions, 800 GB storage, dual 1100W AC power, and the FPR-4125 NEBS profile.
- The FPR4125-NGFW-K9 difference from FPR4145-NGFW-K9 is model scale: FPR4145-NGFW-K9 raises memory to 384 GB, NGFW summary performance to 53G, IPS summary performance to 55G, and AVC new-connection scale to 365K.
- For buyers comparing FPR4125-NGFW-K9 vs FPR4115-NGFW-K9, the 4125 should be ordered when the BOM requires the 800 GB storage profile, 45G Threat Defense row, or model-level NEBS support.
- In a FPR4125-NGFW-K9 vs FPR4145-NGFW-K9 comparison, choose the 4145 only when the approved sizing file requires the larger 4145 memory and performance row instead of the 4125 NGFW appliance identity.
Selection Guide
1. Confirm the NGFW appliance role
Choose FPR4125-NGFW-K9 only when the approved design calls for the Firepower 4125 NGFW appliance and Cisco Secure Firewall Threat Defense rather than ASA or NGIPS ordering.
2. Use the 4125 row for Threat Defense sizing
Keep this SKU when 45 Gbps FW + AVC throughput, 45 Gbps FW + AVC + IPS throughput, 25 million AVC sessions, and 19 Gbps IPsec VPN throughput match the deployment model.
3. Compare adjacent NGFW models by confirmed scale
Move down to FPR4115-NGFW-K9 only if the project accepts the 33G NGFW row, 15 million AVC sessions, 400 GB storage, and non-4125 NEBS profile; move up to FPR4145-NGFW-K9 when the 4145 memory and performance row is required.
4. Lock software and hardware options together
Verify Threat Defense, FXOS, network modules, optics, power cords, SSD spares, fan spares, and any NEBS site requirement before price and availability are finalized.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Exact appliance PID |
FPR4125-NGFW-K9 rather than FPR4125-ASA-K9 or FPR4125-NGIPS-K9 |
Cisco lists separate 4125 orderable identities for NGFW, ASA, and NGIPS appliance roles |
|
Threat Defense and FXOS compatibility |
Target Threat Defense release and matching FXOS version for Firepower 4125 |
Firepower 4100 logical devices require compatible software combinations |
|
100G module requirement |
Whether FPR4K-NM-2X100G is needed and whether the chosen software path supports it |
The 100G module has release-specific support in Cisco documentation |
|
Power and cords |
Dual 1100W AC default, any DC power-supply plan, and approved regional power cords |
Site power and regional cord rules should be resolved before installation |
|
NEBS requirement |
Whether the site needs the FPR-4125 NEBS operating profile |
Cisco identifies NEBS operation specifically for the 4125 platform |
Optional Add-ons
|
Model |
Description |
|---|---|
|
FPR4K-NM-8X10G |
8-port 10-Gbps SFP+ network module |
|
FPR4K-NM-4X40G |
4-port 40-Gbps QSFP+ network module |
|
FPR4K-NM-2X100G |
2-port 100-Gbps single-wide network module |
|
FPR4K-NM-8X1G-F |
8-port 1-Gbps copper hardware bypass network module |
|
FPR4K-NM-6X1SX-F |
6-port 1-Gbps SX fiber hardware bypass network module |
|
FPR4K-NM-6X10SR-F |
6-port 10-Gbps SR hardware bypass network module |
|
FPR4K-NM-6X10LR-F |
6-port 10-Gbps LR hardware bypass network module |
|
FPR4K-NM-2X40G-F |
2-port 40-Gbps SR hardware bypass network module |
|
FPR4K-PWR-AC-1100 |
1100-W AC power supply module |
|
FPR4K-PWR-DC-950 |
950-W DC power supply module |
|
FPR4K-SSD800 |
800-GB SSD for Firepower 4125 and 4145 |
|
FPR4K-S-FAN |
Firepower 4100 fan module |
|
FPR4K-RACK-MNT |
Rack-mount kit |
|
FPR4K-CBL-MGMT |
Cable management brackets |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | FPR4125-NGFW-K9 | Product Type | Cisco Firepower 4125 NGFW appliance |
| Firewall Model | FPR-4125 | Security Software Role | Cisco Secure Firewall Threat Defense / NGFW |
| Form Factor | 1RU | Memory | 192 GB |
| Storage | 800 GB | Dimensions | 1.75 x 16.89 x 29.7 in. (4.4 x 42.9 x 75.4 cm) |
| Weight | 39.4 lb (17.87 kg) with 2 power supplies, 2 network modules, and 6 fans | On-chassis Data Ports | 8 x 1/10 Gigabit Ethernet SFP+ |
| Network Module Bays | 2 | Maximum Interface Expansion | Up to 4 x 100GE QSFP28, 24 x 10GE SFP+, 8 x 40GE QSFP+, or 24 x 1GE ports with network modules and fixed ports |
| Management Port | 1 Gigabit Ethernet SFP port | Management Optics | Supports 1Gbps fiber or copper optical modules |
| Serial Port | 1 x RJ-45 console | USB Port | 1 x USB 2.0 |
| Airflow | Front to rear | Firewall Performance Summary | 80 Gbps |
| FW + AVC Throughput | 45 Gbps | FW + AVC + IPS Throughput | 45 Gbps |
| NGIPS Throughput | 45 Gbps | Maximum Concurrent Sessions with AVC | 25 million |
| New Connections Per Second with AVC | 269K | TLS Throughput | 8.5 Gbps |
| IPsec VPN Throughput | 19 Gbps | Maximum VPN Peers | 20000 |
| Multi-Instance Capable | Yes | High Availability | Active/Standby with Threat Defense HA configuration |
| Clustering | Up to 16 appliances with Threat Defense clustering | Centralized Management | Management Center or Cisco Defense Orchestrator |
| Fixed Port Transceiver Support | 1G and 10G SFP/SFP+ options listed for Secure Firewall 4100 fixed ports | Power Supply Configuration | Dual 1100W AC |
| Power Redundancy | 1+1 | AC Input Voltage | 100 to 240V AC |
| AC Maximum Output Power | 1100W | DC Input Voltage | -40V to -60VDC |
| DC Maximum Output Power | 950W | Fan Modules | 6 hot-swappable fans |
| Fan Redundancy | 5+1 | Rack Mount | 4-post EIA-310-D rack mount rails included |
| NEBS Operation | Supported on FPR-4125 platform | Operating Temperature | 32 to 104F (0 to 40C) or NEBS operation profile for FPR-4125 |
| Operating Humidity | 5 to 95% noncondensing | Operating Altitude | 10000 ft maximum; 13000 ft maximum under FPR-4125 NEBS operation |
| Noise | 63 dBA typical; 74 dBA maximum | Supported SSD | FPR4K-SSD800 for Firepower 4125 and 4145 |
| Supported Power Cord Rule | Only approved power cords or jumper power cords provided with the security appliance are supported |
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