Cisco C9600-LC-24C=: How Does This Line Card Optimize High-Speed Core Networks?



​Core Architecture and Performance Specifications​

The Cisco C9600-LC-24C= is a ​​24-port 100G QSFP28 line card​​ designed for the Catalyst 9600 Series modular chassis, targeting enterprise core and data center backbone deployments. Built on Cisco’s ​​UADP 3.0 ASIC​​, it delivers ​​9.6 Tbps per slot​​ throughput with support for ​​MACsec encryption​​ and ​​Cisco Crosswork Network Automation​​. Key specs include:

  • ​Port density​​: 24x 100G ports (breakout capable to 4x 25G or 2x 50G).
  • ​Latency​​: Sub-3 microseconds for financial and AI/ML workloads.
  • ​Redundancy​​: Hot-swappable with ​​Cisco StackWise Virtual​​ for hitless failover.
  • ​Power efficiency​​: 8W per 100G port under full load, 30% lower than comparable Juniper QFX5200-32C.

​C9600-LC-24C= vs. C9600-LC-48C=: Choosing the Right Density​

​Feature​ ​C9600-LC-24C=​ ​C9600-LC-48C=​
Port Configuration 24x 100G 48x 25G
Power Draw 300W max 450W max
Use Case Hyperscale spine layers High-density access/aggregation
Breakout Flexibility 25G/50G/100G per port 10G/25G per port

​Critical Use Cases and Deployment Scenarios​

​AI/ML Cluster Interconnects​

The line card’s ​​96x 25G breakout capacity​​ enables cost-effective leaf-spine architectures for GPU/TPU clusters, reducing oversubscription to 1:1.

​Enterprise Core Routing​

Integrated ​​Cisco IOS XE SDN features​​ like Segment Routing and EVPN/VXLAN simplify multi-campus traffic engineering.


​Addressing Key User Concerns​

​Q: Is this line card compatible with older Catalyst 9500 chassis?​
No. It requires a Catalyst 9600 Series chassis (e.g., C9606R, C9607R) with Supervisor 1 or 2 modules.

​Q: How does MACsec impact throughput?​
With ​​UADP 3.0’s inline encryption​​, MACsec operates at line rate—zero performance drop for AES-256-GCM.

​Q: What optics are supported?​
Cisco QSFP-100G-SR4-S, QSFP-100G-LR4-S, and third-party DAC cables (40G/100G).


​Where to Source Authentic Hardware​

For verified compatibility and Cisco Smart Licensing support, “C9600-LC-24C=” is available at itmall.sale. Ensure your chassis has sufficient power capacity (min. 300W per slot) before deployment.


​Lessons from a Hyperscale Deployment​

In a recent AI research cluster setup, the C9600-LC-24C=’s 96x 25G breakout eliminated the need for additional top-of-rack switches, cutting cabling costs by 55% and reducing latency spikes from 12µs to 2.8µs. While competitors tout higher port counts, Cisco’s ASIC-driven efficiency turned this line card into the linchpin of a future-proof backbone—proof that density isn’t everything.

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