FPR4125-ASA-K9 – 80G ASA Firewall – 45G Multiprotocol – 800GB SSD
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FPR4125-ASA-K9 Description
FPR4125-ASA-K9 is a Cisco Firepower 4125 ASA firewall appliance in the Cisco Secure Firewall 4100 Series for data center, internet edge, and service-provider firewall deployments that require ASA software on a 1RU security platform. Cisco identifies this SKU as the Firepower 4125 ASA appliance with two network module bays; the 4125 platform provides eight on-chassis SFP+ interfaces, 80 Gbps stateful inspection firewall throughput, 45 Gbps multiprotocol firewall throughput, 25 million concurrent firewall connections, and 19 Gbps IPsec VPN throughput for ASA-based security designs.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
FPR4125-ASA-K9 |
|
Product type |
Cisco Firepower 4125 ASA appliance |
|
Firewall model |
FPR-4125 |
|
Security software role |
Cisco Secure Firewall ASA |
|
Form factor |
1RU |
|
Memory |
192 GB |
|
On-chassis data ports |
8 x 1/10 Gigabit Ethernet SFP+ |
|
Network module bays |
2 |
|
Stateful inspection firewall throughput |
80 Gbps |
|
Multiprotocol firewall throughput |
45 Gbps |
|
Concurrent firewall connections |
25 million |
|
IPsec VPN throughput |
19 Gbps |
|
Default power supply |
Two FPR4K-PWR-AC-1100 1100W AC supplies |
Product Performance
Key Features
Cisco lists FPR4125-ASA-K9 as the Firepower 4125 ASA appliance, so the quote should not be swapped to an NGFW or NGIPS PID unless the software role changes.
The 4125 ASA row adds 45 Gbps multiprotocol throughput, 25 million concurrent firewall connections, 1.1 million new connections per second, and 19 Gbps IPsec VPN throughput.
Firepower 4125 ships with the 800 GB SSD class used by the 4125 and 4145 models, which separates it from 4112 and 4115 appliance storage planning.
The chassis starts with eight fixed SFP+ ports that support 1G or 10G operation, and the two module bays support Cisco-listed Firepower 4100 network modules.
Cisco requires Firepower 4100 deployments to keep FXOS and ASA logical-device versions compatible, making the software target a required quote check.
Cisco identifies Network Equipment Building Standards operation for the FPR-4125 platform, so site requirements for telecom facilities should be checked at the model level.
Application Scenarios
Use FPR4125-ASA-K9 when the design standard is Cisco ASA and the sizing worksheet calls for the 4125 appliance row instead of the lower 4115 ASA profile.
Select this SKU for ASA deployments where 19 Gbps IPsec VPN throughput, 20000 maximum VPN peers, and 25 million firewall connections are the confirmed scale targets.
Choose the 4125 ASA appliance when the rack plan requires a 1RU Firepower 4100 device with dual 1100W AC power, 800 GB storage, two module bays, and a site-level NEBS check.
Product Comparison
|
Parameter |
FPR4125-ASA-K9 | ||
|---|---|---|---|
|
Cisco PID description |
Firepower 4125 ASA appliance |
Firepower 4115 ASA appliance |
Firepower 4145 ASA 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 |
ASA appliance |
ASA appliance |
ASA appliance |
|
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 |
|
Stateful inspection firewall throughput |
80 Gbps |
80 Gbps |
80 Gbps |
|
Multiprotocol firewall throughput |
45 Gbps |
40 Gbps |
50 Gbps |
|
Concurrent firewall connections |
25 million |
15 million |
40 million |
|
New connections per second |
1.1 million |
848K |
1.5 million |
|
IPsec VPN throughput |
19 Gbps |
15 Gbps |
23 Gbps |
|
Maximum VPN peers |
20000 |
15000 |
20000 |
|
Security contexts |
10 included; 250 maximum |
10 included; 250 maximum |
10 included; 250 maximum |
|
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-ASA-K9 vs FPR4115-ASA-K9 comparison, both ASA appliances share 1RU format, 192 GB memory, two module bays, and an 80 Gbps stateful inspection figure, but FPR4125-ASA-K9 moves to 45 Gbps multiprotocol throughput, 25 million connections, 800 GB storage, and dual 1100W AC power.
- The FPR4125-ASA-K9 difference from FPR4145-ASA-K9 is the model scale: FPR4145-ASA-K9 raises multiprotocol throughput to 50 Gbps, connection capacity to 40 million, and memory to 384 GB, while FPR4125-ASA-K9 is the Cisco-listed FPR-4125 platform for NEBS operation.
- For buyers comparing FPR4125-ASA-K9 vs FPR4115-ASA-K9, the 4125 should be ordered when the firewall design needs the 800 GB storage profile, higher ASA connection scale, or model-level NEBS requirement.
- In a FPR4125-ASA-K9 vs FPR4145-ASA-K9 comparison, choose the 4145 only when the BOM requires the larger 4145 ASA performance and memory row instead of the 4125 ASA identity.
Selection Guide
1. Confirm the ASA software role first
Choose FPR4125-ASA-K9 only when the approved design names the Firepower 4125 ASA appliance rather than a Threat Defense, NGFW, or NGIPS orderable PID.
2. Use the 4125 row for ASA sizing
Keep this SKU when 45 Gbps multiprotocol throughput, 25 million concurrent connections, 1.1 million new connections per second, and 19 Gbps IPsec VPN throughput match the sizing file.
3. Compare adjacent ASA models by scale
Move down to FPR4115-ASA-K9 only if the project can accept the lower 4115 ASA multiprotocol, storage, session, VPN, and power profile; move up to FPR4145-ASA-K9 when the 4145 row is required.
4. Lock software, modules, and site power together
Verify the ASA and FXOS version path, 1G or 10G fixed-port optics, any 100G network module requirement, power cord region, and NEBS site requirement before the quote is finalized.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Exact appliance PID |
FPR4125-ASA-K9 rather than FPR4125-NGFW-K9 or FPR4125-NGIPS-K9 |
Cisco lists separate 4125 orderable identities for ASA, NGFW, and NGIPS appliance roles |
|
ASA and FXOS compatibility |
Target ASA 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 ASA and FXOS path supports it |
Cisco ties the 2-port 100G module to specific Firepower 4100 software support |
|
Fixed-port optics |
Required 1G or 10G SFP/SFP+ transceivers for the eight on-chassis ports |
Optics must match the cabling plan before the appliance is shipped |
|
Power and cords |
Dual 1100W AC default, any DC power-supply plan, and approved regional power cords |
Power choices affect rack readiness, redundancy, and site electrical compliance |
|
NEBS requirement |
Whether the installation 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-ASA-K9 | Product Type | Cisco Firepower 4125 ASA appliance |
| Firewall Model | FPR-4125 | Security Software Role | Cisco Secure Firewall ASA |
| 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 | Stateful Inspection Firewall Throughput | 80 Gbps |
| Multiprotocol Firewall Throughput | 45 Gbps | Concurrent Firewall Connections | 25 million |
| New Connections Per Second | 1.1 million | Firewall Latency | 3.5 microseconds with UDP 64B test traffic |
| IPsec VPN Throughput | 19 Gbps | Maximum VPN Peers | 20000 |
| Security Contexts | 10 included; 250 maximum | High Availability | Active/active or active/standby |
| Clustering | Up to 16 appliances | Centralized Management | Cisco Security Manager or Cisco Defense Orchestrator |
| Local Management | Adaptive Security Device Manager | Minimum 100G Module Software | FPR4K-NM-2X100G first supported in FTD 7.2 and ASA 9.18 |
| 100G Module FXOS Support | FPR4K-NM-2X100G supported on Firepower 4100 series with FXOS 2.13 and later | 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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