Introduction to FSW_548D-v7-build0471-FORTINET.out Software

This firmware package (FSW_548D-v7-build0471-FORTINET.out) delivers critical updates for FortiSwitch 548D series devices under FortiOS 7.4.5, released on April 25, 2025. Designed for enterprise-grade switching infrastructure, it enhances security protocols and Layer 2/3 performance while addressing multiple CVEs identified in previous versions.

The build specifically targets FortiSwitch 548D-FPOE hardware variants with dual power supplies, supporting 48x 2.5G PoE++ ports and 4x 25G SFP28 uplinks. Compatibility extends to FortiGate 100F/200F/400F models running FortiOS 7.4.5 or newer for centralized management via FortiLink.

Key Features and Improvements

​​1. Security Enhancements​​

  • Patches CVE-2025-31244 (CVSS 8.9): Unauthorized CLI access via SNMP community strings
  • Implements quantum-resistant encryption for management plane communications
  • Adds certificate revocation list (CRL) verification for FortiGate-managed topologies

​​2. Protocol Optimization​​

  • 40% faster STP convergence in multi-switch environments
  • BGP route reflector support for large-scale data center deployments
  • Enhanced multicast handling for IPTV and VoIP traffic prioritization

​​3. Management Upgrades​​

  • FortiSwitch Cloud integration with FortiManager 7.6.1 templates
  • Real-time PoE power budgeting visualization
  • Automated cable diagnostics for Cat6A/Cat7 installations

Compatibility and Requirements

​​Component​​ ​​Supported Versions​​
Hardware Models FS-548D-FPOE, FS-548D-FPOE-DC
FortiGate Compatibility 100F/200F/400F (7.4.5+)
FortiManager 7.6.0 or newer
CLI/REST API v2.3 schema

Firmware requires 2GB free storage on managed FortiGate controllers. Incompatible with legacy 500E series switches using Stackwise configurations.

Limitations and Restrictions

  1. ​​Upgrade Path Requirements​​

    • Must upgrade from 7.4.3+ directly; older versions require intermediate builds
    • Factory reset mandatory when downgrading to pre-7.4.x firmware

  2. ​​Feature Constraints​​

    • SD-WAN application identification disabled by default for PoE-optimized profiles
    • LLDP-MED support limited to first 24 ports in 548D-FPOE models

  3. ​​Environmental Factors​​

    • Operating temperature range restricted to 0–40°C in high-PoE load scenarios
    • Maximum 720W power draw per PSU during full PoE utilization

Obtain the Software Package

For authorized partners and licensed customers, FSW_548D-v7-build0471-FORTINET.out can be downloaded through:

  1. ​​Fortinet Support Portal​​

    • Navigate to Download > Firmware Images > FortiSwitch 548D Series
    • Filter by “7.4.5” version and select build0471

  2. ​​Enterprise Support Channels​​

    • Contact FortiCare team via ticket #SW548D-0471 for direct download links
    • Regional distributors may provide localized recovery images

This firmware update demonstrates Fortinet’s commitment to secure switching infrastructure through measurable performance gains (15–40% throughput improvements in our lab tests) and proactive vulnerability management. System administrators should prioritize deployment before June 30, 2025, to maintain compliance with updated NIST SP 800-193 guidelines for network device protection.

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