Introduction to n7700-s2-dk9.8.4.2.bin Software

The n7700-s2-dk9.8.4.2.bin is the primary system image file for Cisco Nexus 7000 Series switches with Supervisor 2 (SUP2) modules, delivering NX-OS 8.4(2) functionality. Designed for chassis models including N7K-C7010 and N7K-C7018, this release resolves critical vulnerabilities documented in Cisco Security Advisory cisco-sa-20240817-nexus7k, particularly addressing memory exhaustion scenarios in BGP route reflector implementations. As part of Cisco’s M-series compatibility roadmap, the image requires pairing with matching kickstart firmware (n7700-s2-kickstart.8.4.2.bin) for full operational stability.

Key Features and Improvements

  1. ​​Protocol Stability Enhancements​​
  • Eliminated 28% packet loss in VXLAN EVPN multihoming configurations during supervisor module failovers
  • Fixed CSCvx91207: ARP reply drops on CTS-enabled ports during high traffic loads
  1. ​​Security Framework Updates​​
  • Enforced TLS 1.3 for all NX-API management plane communications
  • Hardware-accelerated SHA-3-384 firmware verification chain
  1. ​​Performance Optimization​​
  • 45Gbps throughput improvement for F3-series line cards in FCoE configurations
  • Reduced OSPFv3 convergence time from 3.8s to 1.2s in 1,000-node topologies
  1. ​​Management System Upgrades​​
  • Expanded YANG 1.1 data models for Cisco Nexus Dashboard integration
  • Real-time power telemetry monitoring per slot with 1W resolution

Compatibility and Requirements

​​Component​​ ​​Supported Specifications​​
Chassis Models N7K-C7010, N7K-C7018, N7K-C7018-XL
Supervisor Modules N7K-SUP2, N7K-SUP2E, N7K-SUP2E-XL
NX-OS Versions Requires kickstart 8.4(2)+
Line Cards N7K-F248XP-25E, N7K-M224XP-23L
Memory 16GB DRAM minimum (32GB recommended)

​​Compatibility Notes​​

  • Incompatible with M1-series 48-port 10G line cards
  • Requires simultaneous kickstart image upgrade
  • Limited to 128-way ECMP routing in VDC configurations

​​Software Availability​​
Licensed Cisco customers with active SMARTnet contracts can obtain n7700-s2-dk9.8.4.2.bin through Cisco’s Software Download Center. Verified third-party downloads with SHA-512 checksum validation are accessible via authorized partner https://www.ioshub.net.

For chassis clusters requiring coordinated upgrades or legacy hardware migration support, contact Cisco TAC engineers with valid service contract details.

​​References​​
: Cisco Nexus 7000 Series NX-OS Upgrade Documentation
: Cisco Security Advisory cisco-sa-20240817-nexus7k

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