• Cisco N9K-X98900CD-A 9Tbps switch with 34x100G + 14x400G ports
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Cisco

Cisco N9K-X98900CD-A | Nexus 9800 Line Card, 34-Port 100G + 14-Port 400G, 9Tbps

N9K-X98900CD-A

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Description

The Cisco N9K-X98900CD-A is a high-density line card designed for the Nexus 9800 Series modular chassis, delivering mixed 100G and 400G connectivity for data center spine and super-spine deployments. With 34 QSFP28 100G ports and 14 QSFP-DD 400G ports, this line card provides up to 9 Tbps of throughput, optimized for AI/ML workloads and high-performance compute environments. Built on dual Cisco Silicon One Q200 ASICs, it supports line-rate MACsec on 16 QSFP28 ports and offers deep packet buffering with Virtual Output Queueing for low-latency, high-efficiency forwarding.

Features

Cisco Silicon One Q200 ASICs with 12.8 Tbps per ASIC throughput
- Dynamic flowlet load balancing for optimized traffic distribution
- Fully shared on-die packet buffering for low latency
- Ingress Virtual Output Queueing (VOQ) for AI/ML fabric optimization
- Line-rate performance for small packets
- Support for 7+1 fabric module redundancy
- Deep buffering with 16 GB external HBM (High Bandwidth Memory)
- Dual supervisor redundancy support
- Hot-swappable design with OIR capability
- Compatible with high-efficiency AC/DC/HVAC power supplies
- Advanced thermal management for high-density deployments
- Support for Cisco NX-OS and ACI software

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Port Configuration: 34 x 100G QSFP28 + 14 x 400G QSFP-DD
- Throughput: 9 Tbps per line card
- Forwarding Performance: 5.858 Bpps
- Packet Buffer: 216 MB on-die + 16 GB external
- MACsec: Line-rate encryption on 16 QSFP28 ports
- ASIC: Dual Cisco Silicon One Q200 (7nm process)
- Fabric Connectivity: 12.8 Tbps with 8 fabric modules (32 x 50G per Q200)
- Power Consumption: 2436W maximum
- Backward Compatibility: QSFP-DD ports support QSFP28 and QSFP+ transceivers
- License Requirement: Network Advantage (-A) license tier
- Hot-Swappable: OIR (Online Insertion and Removal) supported
- Compatible Chassis: Cisco Nexus 9808 (8-slot) and 9804 (4-slot)

FAQs

Q: What is the difference between the N9K-X98900CD-A and N9K-X9836DM-A line cards?
A: The N9K-X98900CD-A offers mixed port density with 34 x 100G and 14 x 400G ports (9 Tbps), ideal for hybrid deployments. The N9K-X9836DM-A provides 36 x 400G ports (14.4 Tbps) with full MACsec on all ports, suited for pure 400G spine architectures.

Q: How many fabric modules are required for full line-rate performance?
A: The N9K-X98900CD-A requires a minimum of 7 fabric modules for 9 Tbps line-rate capacity. With 8 fabric modules installed, the chassis provides 7+1 redundancy and 12.8 Tbps fabric bandwidth per line card.

Q: Can this line card be used in both NX-OS and ACI modes?
A: Yes, the N9K-X98900CD-A supports both Cisco NX-OS standalone mode and Application Centric Infrastructure (ACI) mode, functioning as a spine node in ACI fabric deployments.

Q: Which ports support MACsec encryption?
A: Line-rate MACsec is supported on 16 of the 34 QSFP28 100G ports (top row). The 400G QSFP-DD ports do not support MACsec on this line card model.

Q: What transceivers are compatible with the QSFP-DD ports?
A: The QSFP-DD ports are backward compatible with QSFP56-DD 400G, QSFP28 100G, and QSFP+ 40G transceivers, providing deployment flexibility for staged migrations from 100G to 400G.

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