Full English Description for Cisco FPR6125-NGFW-K9
1. Official Short Overview
Cisco FPR6125-NGFW-K9: Mid-tier 2RU rack-mount Next-Generation Firewall (NGFW) from active Cisco Secure Firewall 6100 series (modern high-density data center / service provider platform, full long-term Cisco TAC support). Factory preloaded Secure Firewall Threat Defense (FTD v7.x) as primary OS, permanent Security Plus K9 unrestricted base license. Fixed native port bank: 12×1/10/25/50G SFP56 multi-speed fiber ports + 4×40/100/200G QSFP56 uplink ports, two independent hot-swappable NM-2 modular expansion bays supporting copper, 10G SFP+, 25G SFP28, 40G QSFP28, 100G QSFP56 breakout hardware bypass modules. Dual dedicated SFP28 out-of-band management ports, RJ45 serial console, USB 3.0 Type-A port. Dual hot-swappable 1200W AC power supplies factory standard for full 1+1 redundancy, multi-socket AMD EPYC unified security processors with integrated hardware crypto offload, 1536GB DDR4 ECC memory, dual hot-swappable 1.8TB U.2 NVMe SSD slots (RAID 1 supported for log/threat rule database redundancy). Dual software support: FTD unified NGFW or classic Cisco Secure Firewall ASA v9.x logical device (full chassis reimage required to switch OS)Cisco.
Official Certified FTD Performance Metrics (1024B standard UDP test packets)
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Raw stateful firewall throughput (FW only): 700.0 Gbps
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Full threat-inspected NGFW throughput (FW+AVC+IPS): 615.0 Gbps
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Standalone Snort 3 NGIPS inspection throughput: 615.0 Gbps
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Hardware-accelerated IPsec VPN throughput: 78.0 Gbps (up to 92.0 Gbps with FTD 7.2 VPN offload enabled)
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TLS/SSL hardware decryption throughput: 110.0 Gbps
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Max concurrent TCP/UDP connections with AVC enabled: 240,000,000
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Max new connections per second with AVC: 3,800,000
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Total concurrent AnyConnect remote + site-to-site IPsec VPN peers: 60,000
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Maximum logical routed VLAN interfaces: 4096
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Maximum multi-context virtual firewalls under K9 license: 1000
Supported Management Tools
Local ASDM/FDM web GUI, Secure Firewall Management Center (FMC), Cisco Security Manager (CSM), Cisco Defense Orchestrator (CDO), FXOS chassis manager, serial console, USB offline backup.
Typical Deployment Scenarios
Large hyperscale enterprise core data center, nationwide carrier backbone DMVPN aggregation, multi-campus large university core edge, tier-2 carrier MSP multi-tenant colocation, ultra-high-bandwidth cloud interconnection segmentation requiring factory-standard dual redundant power, dual expandable 100G/200G high-speed fiber uplink module bays and industry-leading massive concurrent connection & TLS decryption capacityCisco.
2. Complete Hardware & Platform Overview
Product Line Positioning
The FPR6125-NGFW-K9 is the mid-tier 2RU high-density modular rack appliance in the Secure Firewall 6100 generation, positioned above entry FPR6115 and below high-end FPR6135/FPR6145 flagship models. It adopts a multi-socket AMD EPYC unified architecture optimized for ultra-high bandwidth data center and service provider workloads, delivering 615Gbps full threat-inspected throughput, industry-leading 110Gbps TLS decryption, 240 million concurrent session capacity, native 25G/50G SFP56 and 200G QSFP56 fixed base portsCisco. It uses a 2RU rack footprint and dual independent hot-swappable NM-2 expansion slots for flexible port scaling, with factory-standard dual hot-swappable redundant power supplies, 1536GB DDR4 ECC memory, dual hot-swappable NVMe storage, and a 1000 multi-context virtualization limit for hyperscale multi-tenant segmentation demands.
The unified multi-socket AMD architecture consolidates L3 forwarding, bulk IPsec encryption, massive TLS decryption, Snort 3 IPS, and AVC deep application inspection with dedicated hardware QuickAssist crypto acceleration, eliminating throughput degradation when all threat services run simultaneously at full line rate. The chassis runs FXOS chassis manager to control all hardware resources, then instantiates either FTD unified NGFW or ASA classic firewall as a single logical device (the two OSes cannot run concurrently without full chassis reimage).
The permanent K9 Security Plus license removes DES encryption limitations and unlocks full enterprise feature set: unlimited TLS proxy, complete dual-mode HA, full multi-context virtualization, 4096 VLANs, maximum VPN peer counts, and full AVC/IPS/AMP feature access, outperforming all legacy Firepower 4100/4200 series modular rack appliances and fixed-port Firepower 3100 series models. The Secure Firewall 6100 line is Cisco’s modern high-density production platform for carrier-grade and hyperscale data center security, fully manufactured and supported todayCisco.
Physical Chassis & Mechanical Specs
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Form factor: 2RU 19-inch EIA-310-D rack-mount metal chassis, included 4-post rack mounting rails
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Dimensions (H×W×D): 8.88 cm × 42.90 cm × 75.43 cm
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Weight: 28.5 kg fully loaded (dual PSU, two NM modules, all fan assemblies)
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Cooling: 4+1 hot-swappable redundant variable-speed front-to-back airflow fans; single fan fault triggers remaining fans to ramp full speed without traffic outage
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Operating temperature: 0°C ~ +40°C below 10,000 ft altitude; 0°C ~ +35°C from 10,000–13,000 ft altitude
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Storage temperature: -40°C ~ +65°C
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Humidity: 5–95% non-condensing
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Max operating altitude: 3048 m; full NEBS Level 3 telecom certified
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Physical security: Integrated Kensington lock slot for chassis anti-tamperingCisco
Power Supply Specifications
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Standard shipment: Dual hot-swappable 1200W universal AC power supplies (100–240 VAC, 50/60 Hz) factory installed for 1+1 full power redundancy
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DC power option: Optional hot-swappable DC power supplies (-40 to -60 VDC) for telco rack environments
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Power efficiency: >93% at 50% load; active load balancing with dual PSUs installed
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Hot-swappable: PSU replacement without full chassis power shutdown
Hardware Core Architecture
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Processing: Multi-socket unified high-performance architecture – multiple high-core AMD EPYC x86 general security processors with integrated dedicated crypto offload engine for wire-speed IPsec/TLS acceleration
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Memory: 1536 GB soldered DDR4 ECC high-speed SDRAM (48×32GB modules at 3200 MT/s)
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Boot storage: 16 GB onboard eMMC for FXOS chassis OS
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Data storage: Dual hot-swappable U.2 NVMe self-encrypting SSD drive bays; 1.8TB SSD preinstalled in slot 1, slot 2 supports SW RAID 1 for log retention and threat rule database redundancyCisco
Port Layout & Interface Breakdown
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Native fixed multi-speed fiber port bank (no built-in copper RJ45 data ports):
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12 × SFP56 fiber slots supporting 1G/10G/25G/50G SFP/SFP+/SFP28/SFP56 transceivers
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4 × QSFP56 fiber slots supporting 40G/100G/200G QSFP28/QSFP56 transceivers for campus, data center and cloud uplinks
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Dual independent front NM-2 modular expansion bays (two separate slots for flexible port scaling):
Supported interchangeable hardware bypass modules:
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FPR6K-XNM-8X10G: 8×1/10G SFP+ fiber hardware bypass module
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FPR6K-XNM-8X25G: 8×1/10/25G SFP28 fiber hardware bypass module
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FPR6K-XNM-4X40G: 4×40G QSFP28 fiber hardware bypass module (breakout to 4×10G per port)
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FPR6K-XNM-2X100G: Dual-width 2×100G QSFP56 fiber hardware bypass module (occupies both NM-2 bays simultaneously)
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FPR6K-XNM-8GE: 8×1G RJ45 copper hardware bypass module
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FTW fail-to-wire variants for all fiber/copper modules
All SFP/SFP+/SFP28/SFP56/QSFP28/QSFP56 optical transceivers sold separately as compatible accessories. No internal threat expansion blades supported.
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Dedicated out-of-band management ports: 2 × SFP28 1G/10/25G isolated management ports, separated entirely from production data plane traffic for secure chassis/FTD management
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Console & storage ports:
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RJ45 RS-232 serial console for local CLI access
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USB 3.0 Type-A port for firmware upload, configuration backup, log export
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Failover port: DB-15 serial port for stateful sync in Active/Standby or Active/Active HA firewall pairs
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Dual IEC AC power input sockets for primary and redundant power suppliesCisco
Front Panel LED Indicators
Global power status, dual independent PSU health, system fault alarm, FTD logical device operational status, failover sync status, fan fault warning, individual link/activity LEDs for all native SFP56/QSFP56, management and expansion module ports.
Compliance Certifications
FCC Class A, CE, FIPS 140-3 Level 1, EMC enterprise industrial standard, full NEBS Level 3 telecom qualified.
3. K9 Security Plus Full License Feature Set
Encryption & VPN
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Full AES-128/AES-192/AES-256, 3DES, DES support (no DES-only restrictions on K8 base license)
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Unlimited TLS proxy for SIP/SCCP VoIP inspection
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Site-to-site IKEv1/IKEv2 IPsec tunnels, AnyConnect SSL remote access VPN, clientless SSL VPN
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GRE DMVPN hub-spoke encapsulation, multi-chassis VPN clustering (max 16 nodes for spanned EtherChannel, max 16 logical cluster units)
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60,000 total concurrent IPsec/AnyConnect VPN peers maximum
Firewall & Multi-Context Virtualization
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Stateful packet inspection (SPI) firewall, routed / transparent firewall modes
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Multi-context virtual firewall segmentation (up to 1000 independent isolated logical firewalls)
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Object-group ACL policy management, identity NAT, policy NAT, PAT overload, dynamic NAT pools
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Full dual-mode high availability: Active/Standby and load-balanced Active/Active inter-chassis failover
Threat Defense Suite (FTD Unified OS Native)
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Integrated Snort 3 NGIPS intrusion prevention system with global Talos threat signature updates
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AVC Application Visibility & Control: 6000+ recognized applications, geolocation, user-based policy
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Cloud URL filtering database (280M+ categorized global websites)
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AMP for Networks cloud malware sandboxing (optional subscription license)
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Multi-layer DDoS protection: SYN flood guard, TCP packet normalization, malformed packet filtering, strict URPF anti-spoofing
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Layer 7 protocol ALGs: FTP, H.323, SIP, SCCP, RTSP, DNS, HTTP/S, SMB, RDP and mainstream SaaS applications
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Encrypted Visibility Engine (EVE) for TLS 1.3 traffic inspection without full decryption
Routing & Network Services
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Static routing, policy-based routing (PBR), BGP, OSPF, EIGRP dynamic routing protocols
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Full dual-stack IPv4/IPv6 inspection and forwarding
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Local DHCP server for internal LAN endpoints and IoT devices
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PPPoE client for broadband ISP termination
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Hierarchical four-level QoS bandwidth queuing with DSCP marking preservation across VPN tunnels
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Forward Error Correction (FEC) support on all 25G/40G/100G/200G fiber ports
AAA, Logging & Management
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AAA authentication, authorization, accounting via external RADIUS/TACACS+ servers
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Local user credential database for standalone emergency admin login
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Comprehensive event logging, remote Syslog export to external SIEM platforms (PCI-DSS/HIPAA audit compliant)
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SNMPv3 secure monitoring for chassis hardware, throughput, VPN tunnel and threat status
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Native ISE integration for user-identity-aware security policies
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REST API for third-party orchestration and automation
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Native SecureX cloud threat orchestration integration
4. Supported Management Platforms
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FTD / ASA CLI Console: IOS-style command-line interface accessible via serial console or SSH remote access for scripting and advanced enterprise security troubleshooting
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ASDM / FDM Local GUI: Embedded HTTPS web interface for standalone single-device configuration, real-time traffic dashboards, VPN monitoring and threat reporting
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Cisco Security Manager (CSM): On-prem centralized policy platform for bulk multi-site deployment orchestration, mass firmware upgrades and compliance reporting
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Secure Firewall Management Center (FMC): Primary unified management for FTD NGFW deployments, centralizes NGIPS rules, AVC policies, malware sandboxing, URL filtering and AI-powered policy automation
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Cisco Defense Orchestrator (CDO): Cloud-hosted multi-device management supporting zero-touch provisioning, cloud policy sync and SecureX cloud-native threat orchestration
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FXOS Chassis Manager: Chassis-level GUI/CLI to manage power supplies, fans, NM-2 expansion modules, SSD storage and logical device instantiation (switching FTD/ASA requires full chassis reimage)
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Offline backup: TFTP and USB dual methods for OS firmware upload and full configuration export/restore
5. Key Differentiators vs Related Cisco Firewall Models
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vs FPR6125-NGFW-K8 DES Base License: Full unrestricted AES encryption, unlimited TLS proxy, expanded VLAN/session/VPN limits, 1000 multi-context virtualization and complete dual-mode HA enabled; K8 license enforces hard caps on encryption, TLS sessions and virtual instances.
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vs FPR6125-ASA-K9 ASA-Only PID: Identical physical hardware chassis, but factory locked to classic ASA software instead of unified FTD NGFW. ASA variant uses separate standalone IPS images, lacks native integrated AVC and SecureX cloud orchestration, and has limited unified FMC threat management compatibility.
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vs FPR6115-NGFW-K9 Entry 6100 Model: Multi-socket AMD EPYC unified architecture vs single-socket CPU, larger 240M concurrent TCP/UDP sessions vs 140M, 615 Gbps full threat-inspected throughput vs 380 Gbps, expanded 1000 multi-context capacity vs 500 contexts, identical dual NM-2 expansion bay layout and dual redundant power supplies.
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vs FPR6135/FPR6145-NGFW-K9 High-End 6100 Models: Lower overall raw/full-inspected throughput, smaller concurrent session/VPN limits, identical dual redundant power and NM-2 200G expansion capability, cost-optimized for large enterprise vs ultra-carrier core backbone workloads.
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vs FPR4225-NGFW-K9 Secure Firewall 4200 Mid-Tier Model: 2RU high-density chassis vs 1RU form factor, native 50G/200G fixed fiber ports vs max 25G, drastically higher throughput and concurrent connection counts, dual NM-2 expansion bays supporting dual-width 100G modules, active production lifecycle vs older mid-range 4200 series hardware.
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vs Secure Firewall 3130-NGFW-K9 Compact 1RU Series: Dual independent NM-2 expansion slots (single NM-2 bay on 3100 series), native 50G/200G fixed fiber ports, dual redundant power supplies factory standard, larger storage capacity, far higher performance, modular expandable uplink density vs fixed-port compact appliance.
6. E-Commerce Short Marketing Summary
Cisco FPR6125-NGFW-K9 Mid-Tier High-Density 2RU Rack-Mount Multi-Speed SFP56/QSFP56 Next-Generation Firewall, active production Cisco Secure Firewall 6100 series Security Plus unrestricted K9 NGFW appliance with 12 built-in 1/10/25/50G SFP56 + 4×40/100/200G QSFP56 high-speed fiber uplink ports, two independent NM-2 modular expansion bays supporting optional 10G/25G/40G/100G fiber hardware bypass modules, dual dedicated SFP28 out-of-band management ports, dual RJ45 serial + USB 3.0 console interfaces, dual hot-swappable redundant 1200W universal AC power supplies factory standard, multi-socket AMD EPYC unified security processor architecture with upgraded 1536GB DDR4 ECC memory, dual hot-swappable 1.8TB NVMe SSD slots with factory preinstalled storage, primary Secure Firewall Threat Defense (FTD v7.x) OS with optional ASA OS v9.x support. K9 license delivers full DES/3DES-AES strong encryption, unlimited internal host capacity, stateful SPI firewall, IPsec site-to-site/AnyConnect SSL remote access VPN, inline hardware Snort3 NGIPS intrusion prevention, AVC application visibility & control, NAT/PAT, PPPoE broadband client, unlimited TLS proxy for VoIP communications, up to 1000 multi-context virtual firewalls and dual Active/Standby/Active/Active stateful failover with native multi-device VPN clustering (max 16 nodes). Up to 615.0 Gbps full threat-inspected NGFW throughput, 240,000,000 concurrent TCP/UDP connections and 60,000 simultaneous IPsec VPN tunnels, managed via local ASDM/FDM GUI, serial console, Cisco Security Manager and Secure Firewall Management Center. Active production mid-tier high-density rack-mount NGFW optimized for hyperscale enterprise headquarters, nationwide carrier central DMVPN aggregation hubs and multi-building large university 10G/25G/50G/100G fiber core edge security deployments requiring factory-standard dual redundant power, dual expandable high-speed fiber uplink module bays and massive multi-tenant virtualization & TLS decryption capacity.
7. Product Catalog Keyword Tags
Cisco, FPR6125-NGFW-K9, Secure Firewall 6100 Series Mid-Tier High-Density 2RU Rack-Mount All-Fiber SFP56/QSFP56 Next-Generation Firewall, Active Production Hyperscale Enterprise National Carrier Core Stateful Inspection NGFW, Dual Hot-Swap Redundant Multi-Fan Front-to-Back Cooling 2RU Rack Chassis, Dual Built-In Hot-Swap Redundant 1200W Internal Universal AC Power Supplies, 12 × 1/10/25/50GBase-X SFP56 Multi-Speed Native Fiber Uplink Ports, 4 × 40/100/200GBase-X QSFP56 Multi-Speed Native Fiber Uplink Ports, 2 × Independent NM-2 Modular Expansion Bays (FPR6K-XNM-8X10G / FPR6K-XNM-8X25G / FPR6K-XNM-4X40G / FPR6K-XNM-2X100G Hardware Bypass Modules Supported), Dual SFP28 Out-of-Band Management Ports, RJ45 Serial Console Port, USB 3.0 Type-A Storage Port, DB-15 Inter-Chassis Stateful Failover Serial Port, Multi-Socket AMD EPYC Unified Security Processors with Native Integrated QuickAssist Crypto Offload, 1536768 MB DDR4 ECC SDRAM, 16 GB System eMMC Boot Flash, Dual Hot-Swap U.2 NVMe SSD Drive Bays (1×1.8TB Factory Preinstalled), Cisco Secure Firewall Threat Defense FTD Primary OS, Optional ASA OS Dual Software Support, Stateful Packet Inspection SPI, 700.0 Gbps Max Raw Firewall Throughput, 615.0 Gbps Max Full Threat-Inspected NGFW Throughput, 615.0 Gbps Standalone Snort 3 NGIPS Inspection Throughput, 78.0 Gbps Base Hardware-Accelerated 3DES/AES VPN Throughput (92.0 Gbps Offload Enabled), 110.0 Gbps TLS Hardware Decryption Throughput, Snort 3 NGIPS Threat Detection Engine, AMP for Networks Cloud Malware Sandbox Integration, URL Category Web Filtering (6000+ Recognized Applications / 280M+ Global URLs), IPsec IKEv1/IKEv2 DMVPN Site-to-Site & AnyConnect SSL/DTLS Remote Access VPN, Full DES/3DES-AES Unrestricted Strong Encryption Suite, L2 Wire-Speed Integrated Switch Functionality, Dual NM-2 Expandable Port Architecture Supporting 10G/25G/40G/100G/200G Uplinks, NAT PAT Static Dynamic Dynamic Address Translation, PPPoE DSL Broadband Aggregation Client, VoIP H.323 SIP SCCP TLS Proxy Inspection, Transparent Layer 2 Firewall Mode, Multi-Context Virtual Firewall Segmentation (Up to 1000 Independent Contexts), Active/Standby & Active/Active Dual-Mode Stateful Failover Redundancy, Native Multi-Device VPN Clustering & Load Balancing (Max 16 Nodes), 4096 Logical Routed VLAN Maximum (Security Plus K9 License), 60000 Max Simultaneous IPsec/AnyConnect VPN Peers, 240,000,000 Concurrent TCP/UDP Connections, IEEE 1588v2 PTP Precision Time Protocol, Cisco AI Assistant for Automated Policy Tuning, Encrypted Visibility Engine (EVE), SecureX Cloud Orchestration Integration, ISE Identity Integration Support, ASDM/FDM Dual Embedded Local Web GUIs, Cisco Security Manager CSM Centralized Multi-Site Policy Orchestration, Secure Firewall Management Center FMC Threat Rule Centralized Control, Cisco Defense Orchestrator CDO Cloud Multi-Device Zero-Touch Management, Syslog SNMPv3 Secure Monitoring, Full Dual-Stack IPv4/IPv6 Routing & Inspection Support, Application-Aware Hierarchical QoS Bandwidth Scheduling, FIPS 140-3 Level 1 FCC Class A Office Certified, Full NEBS Level 3 Telecom Qualified, Active Production Platform (Current Cisco High-Density Data Center / SP NGFW), Full Long-Term Cisco TAC Support, Security Plus K9 Unrestricted Upgrade Over FPR6125-NGFW-K8 DES Base License, Hyperscale Enterprise Headquarters 2RU High-Density All-Fiber 50G/200G Edge NGFW, National Carrier Central DMVPN Aggregation Dual NM-2 Expandable Dual Redundant PSU Mid-Tier High-Density Security Appliance, Multi-Building Large University 1000-Context Multi-Tenant Virtual Segmentation Mid-Tier 2RU Rack Firewall, Direct Hardware Upgrade Replacement for Discontinued FPR4145 Legacy Firepower 4100 Carrier-Grade Rack Appliance
Naming Rule Explanation
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FPR: Modern Secure Firewall hardware prefix for active-production 6100 series high-density modular rack security appliances
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6125: Mid-tier dual expansion bay 2RU rack-mount national hyperscale enterprise/carrier core hardware model identifier within Secure Firewall 6100 active production platform
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NGFW: Abbreviation for Next-Generation Firewall, signifies factory PID licensed to run unified Secure Firewall Threat Defense (FTD) primary operating system (distinguishes from ASA-only FPR6125-ASA-K9 PID)
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K9: Premium unrestricted Security Plus license identifier unlocking full AES encryption, expanded session/VLAN capacity, unlimited TLS proxy, up to 1000 multi-context virtual firewalls and dual-mode Active/Standby + Active/Active stateful failover; contrasted with K8 base DES-only restricted license
Hardware Distinction Note
FPR6125-NGFW-K9 is the mid-tier dual-NM high-density 2RU modular rack model of the active-production Secure Firewall 6100 generation, built on a modern multi-socket AMD EPYC unified architecture optimized for carrier and hyperscale data center workloads. Key differentiators include native 50G SFP56 / 200G QSFP56 fixed base ports, USB 3.0, dual dedicated SFP28 management ports, dual hot-swappable redundant power supplies factory standard, dual independent NM-2 expansion bays supporting full dual-width 100G QSFP uplink modules, 240 million concurrent sessions and 60,000 VPN peer limit, with copper-free all-fiber fixed port layout. This product remains fully manufactured, sold, and supported by Cisco with full long-term TAC service contracts available.
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