Performance Benchmark: Cisco Nexus N9K-C9364C vs N9K-C9364C-GX Switch Comparison

May 10 , 2025 3

 Product Overview

 N9K-C9364C

- Port Configuration: 64x100G QSFP28 ports

- Switching Capacity: 12.8Tbps full duplex

- ASIC Architecture: Cisco Cloud Scale switching chip

- Buffer Memory: 36MB dynamic shared buffer

- Latency: Sub-microsecond latency (~700ns)

- Scalability: Supports VXLAN/EVPN overlay technologies

- Ideal Use: Large-scale data center core/aggregation layers, HPC environments

N9K-C9364C-GX

- Port Configuration: 64x100G QSFP-DD ports (backward compatible with QSFP56/28)

- Switching Capacity: 25.6Tbps full duplex

- ASIC Architecture: Enhanced Cisco Cloud Scale Plus chip

- Buffer Memory: 48MB intelligent dynamic buffer

- Latency: Optimized to ~500ns

- Scalability: Provides 400G upgrade path (via breakout cables)

- Ideal Use: Next-gen cloud data centers, AI/ML infrastructure, hyperscale networks

 Technical Differentiators

 Use Case Comparison

 1. Traditional Data Center Networks

- N9K-C9364C: Optimal for enterprise data center cores handling predictable east-west traffic

- N9K-C9364C-GX: Better suited for multi-tenant cloud environments requiring granular traffic isolation

 2. AI/ML Infrastructure

- N9K-C9364C: Supports medium-scale AI training clusters (100-200 nodes)

- N9K-C9364C-GX: Optimized for large distributed training (500+ nodes) with superior RDMA support

 3. Storage Networking

- N9K-C9364C: Ideal for traditional SANs supporting FC/FCoE

- N9K-C9364C-GX: Delivers 30% lower latency for NVMe-over-Fabric implementations

 4. Service Provider Networks

- N9K-C9364C: Suitable for metro core and IP backbone networks

- N9K-C9364C-GX: Supports next-gen protocols like SRv6 for 5G transport networks

 Selection Guidelines

 Choose N9K-C9364C when:

- Current network operates primarily at 100G with no near-term 400G plans

- Budget constraints exist but high-performance core switching is required

- Network traffic patterns are relatively stable and predictable

 Choose N9K-C9364C-GX when:

- Planning 400G migration within 2-3 years

- Running burst-intensive applications like AI/ML

- Operating hyperscale multi-tenant environments

- Data center power efficiency is a critical requirement

 Deployment Case Studies

Financial Services Example:

A global bank deployed N9K-C9364C-GX for electronic trading:

- 40% reduction in order processing latency

- 2.5x increase in transactions per second

- Packet loss rates below 0.0001%

Cloud Provider Implementation:

Major CSP utilizes N9K-C9364C as regional core switches:

- Interconnects >5,000 physical servers

- Maintains 12,000 VXLAN tunnels

- Achieves <50ms failover times

 Conclusion

The N9K-C9364C series represents Cisco's evolving data center networking solutions. While the standard model offers proven performance, the GX variant delivers future-ready capabilities. Selection should balance current requirements against 3-5 year technology roadmaps. For most organizations, the GX model's forward-looking features and performance headroom justify the investment where budget permits.