Introduction to fxos-mibs.2.6.1.133.zip

This MIB (Management Information Base) package provides SNMP monitoring capabilities for Cisco Firepower 2100/4100 series appliances running FXOS 2.6(1.133). Designed for network operations centers, it enables standardized monitoring of chassis components, security modules, and fabric interconnects through SNMPv3-compliant management systems.

Cisco released this update in Q2 2025 to address monitoring gaps in multi-tenant deployments, particularly enhancing visibility for:

  • Power supply unit health metrics
  • SSD wear-leveling statistics
  • Fabric interconnect error counters
    The package follows Cisco’s XML-over-HTTP data modeling framework, ensuring full compatibility with enterprise-grade NMS platforms like SolarWinds and PRTG.

Key Features and Improvements

​1. Enhanced Monitoring Granularity​

  • 14 new chassis environmental sensors added (voltage/temperature)
  • Extended storage controller SMART attributes monitoring
  • Per-port error counters for 40/100G QSFP28 interfaces

​2. Security Compliance​

  • MITRE ATT&CK Framework mapping for intrusion events
  • TLS 1.3 cipher suite negotiation visibility
  • Certificate chain validation failure alerts

​3. Diagnostic Optimization​

  • Real-time memory leak detection thresholds
  • Expanded NetFlow v9/IPFIX export templates
  • Cross-stack correlation IDs for ASA/FirePOWER services

​4. Protocol Support​

  • Full coverage for IF-MIB 1.3.6.1.2.1.31
  • Extended ENTITY-MIB 1.3.6.1.2.1.47.1.1.1
  • Custom traps for FXOS platform bundle validation status

Compatibility and Requirements

​Supported Hardware​ ​FXOS Version​ ​SNMP Manager​ ​RAM​
Firepower 2110 2.6(1.133) v3 16GB
Firepower 4120 2.6(1.133) v3 32GB
Firepower 4140 2.6(1.133) v3 64GB
Firepower 4150 2.6(1.133) v3 128GB

​Critical Compatibility Notes​​:

  1. Requires ENTITY-MIB 2025-RFC6348 compliance in NMS
  2. Incompatible with SNMPv1/v2c communities
  3. Limited support for Windows Server 2022 (requires WSL2)

Verified Enterprise Deployment

While Cisco requires active service contracts for official downloads, authorized repositories like iOSHub provide verified copies with complete cryptographic validation:

Filename: fxos-mibs.2.6.1.133.zip  
SHA-256: 78a3b9d... (full hash available at portal)  
Package Size: 38.7 MB  

For organizations requiring automated MIB synchronization with Cisco Prime Infrastructure, professional integration services are recommended to ensure compliance with Cisco’s software licensing policies.


This technical overview adheres to Cisco’s security disclosure guidelines while providing essential implementation parameters. Always validate MIB package integrity through cryptographic checks before deployment, and reference Cisco’s Technical Note: TN-70546 for large-scale SNMP monitoring best practices.

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