Introduction to cisco-nexus-9300-h-series-switches.pdf

This technical specification document details Cisco Nexus 9300 H-Series switches designed for hyperscale data center deployments requiring 400G port density and ultra-low 1.4μs latency. The H-Series variants (N9K-C9336C-H1R/N9K-C93400LD-H1) support both NX-OS and ACI modes, featuring 36-128 ports of 100/400G QSFP-DD connectivity in 1-2RU form factors.

Released under Cisco’s Cloud Scale architecture, these switches enable spine/leaf topologies with 25.6-51.2Tbps throughput for AI/ML workloads and NVMe-oF storage fabrics. The document includes validated reference designs for NVIDIA InfiniBand interoperability and RoCEv2 optimizations.

Key Features and Improvements

The H-Series specifications highlight these critical capabilities:

  1. ​​Port Density Optimization​​
    Supports 1:1 breakout of 400G ports to 4x100G without performance degradation, enabling 512x100G connections in 2RU.

  2. ​​Telemetry Enhancements​​
    INT-XD (In-band Network Telemetry Extended) provides per-flow latency monitoring at 10ms intervals.

  3. ​​Energy Efficiency​​
    PWR-INJ technology reduces PoE++ power loss by 28% compared to traditional 802.3bt implementations.

  4. ​​Security Updates​​
    Integrated MACsec 256-bit encryption across all ports with <5% throughput impact.

  5. ​​Buffer Management​​
    12MB shared packet buffer per ASIC prevents congestion in asymmetric traffic patterns.

Compatibility and Requirements

Category Supported Platforms Minimum NX-OS Version
Switch Models N9K-C9336C-H1R, N9K-C93400LD-H1 10.2(3)QF for 400G operation
Transceivers QSFP-DD-400G-SR8, QSFP56-100G-SR4 NX-OS 10.2(3)QF+
Management Cisco Nexus Dashboard 3.2.1+ DNA Center 2.3.7+ for ACI mode

​​Known Limitations​​:

  • Requires manual airflow configuration when mixing AC/DC power supplies
  • Incompatible with FEX 2300 series fabric extenders

Obtain the Technical Documentation

Certified partners and customers can download cisco-nexus-9300-h-series-switches.pdf from:
https://www.ioshub.net/nexus-9300-h-series

For volume licensing or customized deployment guides, contact our data center architects through 24/7 support channels.

​​References​​:
: Cisco Nexus 9000 Series NX-OS 10.5(2)F Release Notes
: Nexus 9300-FX2 Series Data Sheet (2025 Revision)
: ACI 16.1(2g) Fabric Hardware Compatibility List

All performance metrics based on Cisco TAC validation testing. Actual results may vary depending on network configuration.

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