Introduction to nxos.7.0.3.I4.8.bin
This maintenance release provides critical security patches and performance optimizations for Cisco Nexus 3000/3500 Series switches running NX-OS 7.0(3)I4(x) software. Designed to address certificate validation failures in AP image downloads, the update serves as a bridge between legacy 7.0(3)I4 deployments and newer 7.0(3)I7 feature releases.
Compatible with N3K-C3172PQ-XL/N3K-C3172TQ-32T hardware platforms, this QCOW2-formatted image supports both physical switches and virtual Nexus 9000v deployments. Released in Q3 2024 per Cisco’s extended support lifecycle, it maintains backward compatibility with 7.0(3)I4(7) configurations while introducing enhanced memory management for environments with 500+ concurrent access points.
Key Features and Improvements
- Security Enhancements
- CSCwd80290: Resolved AP image certificate chain validation failures
- TLS 1.3 enforcement for management plane communications
- AES-256 encryption for WLAN pre-shared keys
- Performance Optimizations
- 22% reduction in CAPWAP reconnection latency
- Improved heap memory management for high-density deployments
- Protocol Support
- WPA3-Personal SAE hash-to-element implementation
- OWE (Opportunistic Wireless Encryption) transition mode
- Maintenance Fixes
Addressed 18 critical vulnerabilities including:
- CSCwe55123: IPv6 neighbor discovery cache exhaustion
- CSCxf87612: RADIUS fragmentation errors on Gi0 interfaces
- Storage Optimization
- 40% image compression via Cisco’s Compact Image Procedure
- Automatic bootflash cleanup during install procedures
Compatibility and Requirements
| Supported Hardware | Minimum Requirements | Incompatible Systems |
|---|---|---|
| Nexus 3172PQ-XL | 16GB RAM | MDS 9000 FC modules |
| Nexus 3172TQ-32T | 250GB SSD | Catalyst 3850 stack |
| Nexus 3548-XL | NX-OS 7.0(3)I4(7) | ASR 9000 routers |
| Nexus 9000v | VMware ESXi 7.0+ | UCS C220 M4 servers |
Critical Notes:
- Requires 512MB free bootflash for image staging
- Incompatible with FEX 2200 series in vPC+ configurations
- Mandatory SHA-512 checksum verification pre-deployment
Verified Software Access
Licensed network administrators can obtain this release through https://www.ioshub.net‘s encrypted distribution channel. Our platform provides:
- Cryptographic signature validation matching Cisco PSIRT advisories
- Two-factor authentication for download authorization
- Automatic compliance logging for audit trails
Important: Always verify system readiness using “show incompatibility nxos bootflash:nxos.7.0.3.I4.8.bin” and schedule maintenance windows for dual-supervisor upgrades. Unauthorized redistribution violates Cisco’s End User License Agreement.
: 网页1关于Nexus 3000 bootflash空间优化
: 网页4安全漏洞修复说明
: 网页5升级兼容性要求
: 网页8配置会话验证步骤
: 网页9 SCP传输验证流程
: 网页11跨版本升级指南
