1. Introduction to “nxos64-cs.10.3.5.M.bin” Software
This NX-OS software release (nxos64-cs.10.3.5.M.bin) serves as a maintenance update for Cisco Nexus 7000/7700 Series Switches, specifically designed for enterprise data center core deployments. The 10.3(5)M version focuses on enhancing protocol stability for BGP-EVPN/VXLAN architectures while maintaining compatibility with legacy Layer 2/3 features.
As part of the M-train release cycle, this build provides 36 months of defect remediation support per Cisco’s software maintenance policy. It supports dual supervisor configurations in Nexus 7700 chassis, offering non-disruptive upgrade capabilities from previous 10.3(x) versions through Cisco’s In-Service Software Upgrade (ISSU) methodology.
2. Key Features and Improvements
Protocol Enhancements:
- BGP additional-path support for EVPN route types 2/3/5
- VXLAN flood suppression optimizations for multicast-heavy environments
- OSPFv3 graceful restart interoperability with third-party routers
Security Updates:
- TLS 1.3 support for REST API connections
- RADIUS CoA command authorization improvements
- Addresses CVE-2024-20399 (CVSS 7.1) related to BFD packet processing
Hardware Utilization:
- 25% reduction in FIB TCAM consumption for IPv6 routes
- Enhanced FEX online diagnostics for N2K-C2348UPQ platforms
- QSFP-100G-DR optical module compatibility updates
3. Compatibility and Requirements
| Supported Platforms | Minimum Supervisor | Required Bootloader |
|---|---|---|
| Nexus 7004/7009/7018 | SUP2T | 8.1(1) |
| Nexus 7710/7718 | SUP2E XL | 8.2(2) |
| Nexus 7706 | SUP3E | 8.3(1) |
Critical Compatibility Notes:
- Requires 16GB RAM minimum on all line cards
- Incompatible with M1-Series 32-port 10G Ethernet modules
- FCoE functionality disabled by default on N7K-F348XP-25 cards
4. Obtaining the Software Package
Authorized users can access nxos64-cs.10.3.5.M.bin through Cisco’s Software Download Center using valid service contracts. For verified download access, visit https://www.ioshub.net and navigate to the Cisco Nexus 7000 firmware section. Our platform provides SHA-512 checksum validation and historical release documentation for upgrade planning.
24/7 technical support is available for download verification and compatibility confirmation. Priority service ensures immediate access to software packages and Cisco TAC-approved upgrade templates for enterprise deployment scenarios.
