FPR4112-ASA-K9 – 40G ASA Firewall – 8x10G SFP+ – 2 NM Bays

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FPR4112-ASA-K9 Description

The FPR4112-ASA-K9 is a Cisco Secure Firewall 4100 Series Firepower 4112 ASA appliance for internet-edge and data center perimeters. The 1RU appliance delivers 40 Gbps of stateful inspection throughput, 10 million concurrent connections and 9 Gbps of IPsec VPN, with eight fixed 1G/10G SFP+ ports and two network module bays. Active/active failover needs multiple-context mode, and the appliance includes 10 security contexts with a maximum of 250.

Quick Specs

Parameter

Specification

Product ID

FPR4112-ASA-K9

Product type

Cisco Firepower 4112 ASA appliance

Form factor

1RU

On-chassis data ports

8 x 10 Gigabit Ethernet SFP+

Network module bays

2

Stateful inspection firewall throughput

40 Gbps

Multiprotocol firewall throughput

30 Gbps

Concurrent firewall connections

10 million

New connections per second

400000

IPsec VPN throughput

9 Gbps

Power supply configuration

Single 1100W AC; dual optional; single or dual 950W DC optional

Fan modules

6 hot-swappable fans

Product Performance

Stateful Inspection Firewall Throughput
Multiprotocol Firewall Throughput
Concurrent Firewall Connections

Key Features

IPsec VPN Capacity

The appliance terminates 9 Gbps of IPsec VPN (450B UDP, site-to-site) for up to 10,000 peers, which sets how many remote sites and users one unit can serve.

Security Contexts

Ten virtual firewalls are included and the limit is 250. Each context carries its own policy, so separate tenants or business units share one chassis.

Failover And Clustering

ASA runs active/standby failover, or active/active when multiple-context mode is on. Clustering joins up to 16 appliances into one logical firewall.

Fixed Ports And Module Bays

Eight fixed SFP+ ports run at 1G or 10G. The two bays take 8x10G, 4x40G or 2x100G modules, up to 24 10G ports or four 100G ports in total, and the 2x100G module needs ASA 9.18.1 or later.

Power And Cooling

Two 1+1 power slots hold 1100W AC or 950W DC supplies, and the unit ships with one AC supply. Six hot-swappable fans keep airflow front to rear and tolerate a single fan failure.

Primary SSD For The ASA Instance

The 400 GB SSD in slot 1 hosts the ASA logical device and must stay installed. Slot 2 is limited to the optional MSP, and RAID is not supported.

Application Scenarios

Internet Edge With ASA Policy

At a campus or headquarters internet edge, the appliance enforces ASA policy at 40 Gbps of stateful inspection and terminates remote-access and site-to-site IPsec tunnels for up to 10,000 VPN peers.

Multi-Tenant Data Center Perimeter

A data center perimeter shared by several business units can split policy into security contexts, with 10 included and up to 250 supported on the same appliance.

Clustered 10G Firewall Tier

Where one firewall is not enough, up to 16 appliances can run as an ASA cluster, with the fixed SFP+ ports facing 10G switches and the two module bays adding 40G or 100G links.

Product Comparison

Parameter

FPR4112-ASA-K9

FPR4112-NGFW-K9

FPR4115-ASA-K9

Stateful inspection firewall throughput

40 Gbps

40 Gbps

80 Gbps

Throughput: FW + AVC + IPS

Not applicable

19 Gbps

Not applicable

Maximum concurrent sessions

10 million

10 million

15 million

IPsec VPN throughput

9 Gbps

8.5 Gbps

15 Gbps

Maximum VPN peers

10,000

10,000

15,000

Network module slots

2

2

2

Memory

96 GB

96 GB

192 GB

Storage

400 GB

400 GB

400 GB

Power supply

Single 1100W AC; dual optional; single or dual 950W DC optional

Single 1100W AC; dual optional; single or dual 950W DC optional

Single 1100W AC; dual optional; single or dual 950W DC optional

FPR4112-ASA-K9 and FPR4112-NGFW-K9 share the same 1RU chassis, eight SFP+ ports, two network module bays and 400 GB SSD, and the PID decides the software: the ASA appliance is rated at 40 Gbps of stateful inspection and 9 Gbps of IPsec VPN, while FPR4112-NGFW-K9 runs Threat Defense at 19 Gbps with application inspection and IPS. Sites that want IPS, malware or URL filtering subscriptions on this hardware should order the NGFW PID. Where ASA sessions must pass 10 million connections or IPsec must pass 9 Gbps, FPR4115-ASA-K9 lists 15 million connections, 15 Gbps and 80 Gbps of firewall throughput on 192 GB of memory instead of 96 GB, with the same single 1100W AC supply by default.

Ordering Checklist

  • ASA licenses: Order the Base license L-FPR4100-ASA=, the free encryption license L-FPR4K-ENC-K9=, and L-FPR4K-ASASC-10= for each extra block of 10 security contexts. ASA models run on Smart Licensing, and the 10 contexts included stop at that count unless more are ordered.
  • Smart Software Licensing account: Set up an account for the end customer, or link the existing account to the order. The account is required before the order is placed, so the licenses have nowhere to be deposited otherwise.
  • Network modules: Decide which of FPR4K-NM-8X10G, FPR4K-NM-4X40G or FPR4K-NM-2X100G goes in the two bays; FPR4K-NM-2X100G needs ASA 9.18.1 or later. The bays ship empty of modules beyond the eight fixed SFP+ ports, and an unsupported release cannot use the 100G module.
  • Power supplies: The unit ships with one FPR4K-PWR-AC-1100; add a second one, or choose FPR4K-PWR-DC-950 where the site feeds DC. The second slot is 1+1 redundancy; DC and blank-panel choices are separate PIDs.
  • Power cords: Order one cord per supply in the destination country’s standard; orders to Argentina, Brazil and Japan must include the matching cord. Those destinations cannot be shipped without the cord ordered on the system.

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-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-SSD400

400-GB SSD for Firepower 4112 and 4115

FPR4K-RACK-MNT

Rack-mount kit

Specifications

Parameter Specification Parameter Specification
Product ID FPR4112-ASA-K9 Product type Cisco Firepower 4112 ASA appliance
Firewall model FPR-4112 Rack units 1RU
Dimensions 1.75 x 16.89 x 29.7 in. (4.4 x 42.9 x 75.4 cm) On-chassis data ports 8 x 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 Serial port 1 x RJ-45 console
USB port 1 x USB 2.0 Storage 400 GB
Fan modules 6 hot-swappable fans Power supply configuration Single 1100W AC; dual optional; single or dual 950W DC optional
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 Stateful inspection firewall throughput 40 Gbps
Multiprotocol firewall throughput 30 Gbps Concurrent firewall connections 10 million
New connections per second 400000 Firewall latency 3.5 microseconds with UDP 64B test traffic
IPsec VPN throughput 9 Gbps Maximum VPN peers 10000
Security contexts 10 included; 250 maximum High availability Active/active or active/standby
Clustering Up to 16 appliances Fixed port transceiver support 1G and 10G SFP/SFP+ options listed for Firepower 4112 fixed ports
Fixed port first supported release Threat Defense 6.6 / ASA 9.14 Mounting 4-post EIA-310-D rack mount rails included
Weight 17.87 kg (39.4 lb) with 2 power supplies, 2 network modules, and 6 fans Operating temperature 32 to 104F (0 to 40C)
Operating humidity 5 to 95% noncondensing Operating altitude 10000 ft maximum
Noise 63 dBA typical; 74 dBA maximum

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    Mary Chen
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    I was overprepared for issues. None came up. Just a clean transaction.

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    Posted on 09/01/2026
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    4.0

    We’ve built a multi-year purchasing history with Layer23. Took a little longer to clear customs than expected, otherwise excellent.

    Thomas Clark
    Posted on 05/01/2026
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    5.0

    Good product, good price, good service.

Questions & Answers

  • Which FXOS release does FPR4K-NM-2X100G need in FPR4112-ASA-K9?

    FPR4K-NM-2X100G needs FXOS 2.13 or later in FPR4112-ASA-K9, plus ASA 9.18.1, per the FXOS compatibility guide and hardware installation guide. The 4-port 100G module and the double-wide FPR9K-DNM-2X100G are not supported on the 4100 chassis.
  • Which slots take network modules in FPR4112-ASA-K9, and how are empty slots covered?

    Network modules go in slots 2 and 3 of FPR4112-ASA-K9. Empty slots take the FPR4K-NM-BLANK= cover. Copper SFPs in FPR4K-NM-8X10G can fill only one row, upper or lower, per the Secure Firewall 4100 hardware installation guide.
  • Which PIDs cover a spare fan, an empty power slot and the rack kit for FPR4112-ASA-K9?

    Order FPR4K-FAN= for a spare fan, FPR4K-PSU-BLANK= for an empty power slot, FPR4K-RACK-MNT= for the rack-mount kit and FPR4K-CBL-MGMT= for cable management. The ordering guide lists each with an equals-sign spare version.
  • What is the maximum VLAN count on FPR4112-ASA-K9?

    The maximum VLAN count on FPR4112-ASA-K9 is 1,024, per the ASA 9.22 license limits table. That table also lists 10,000,000 concurrent connections and 10,000 VPN peers for the appliance, so VLAN count is a design limit set by the license table, not by port count.
  • Which ASA releases can run on FPR4112-ASA-K9 with FXOS 2.18?

    FPR4112-ASA-K9 runs ASA 9.23, 9.22, 9.20 and 9.19 with FXOS 2.18, per the FXOS compatibility guide. FXOS and the ASA release must be compatible with each other before upgrading either one.

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