• Cisco N9K-X9736C-FX3 36-port 100G QSFP28 silver switch with MACsec
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Cisco

Cisco N9K-X9736C-FX3 | Switch: 36x100G QSFP28 | MACsec | ACI Spine + NX-OS

N9K-X9736C-FX3

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Description

High-density 36-port 100G FX3 cloud-scale line card with hardware-based MACsec for secure, line-rate encryption. Supports NX-OS aggregation and Cisco ACI spine roles, delivering predictable latency, granular QoS, and scale for modern data-center fabrics.

Features

- 36x100G QSFP28 ports for dense, secure 100G fabrics
- Hardware MACsec for line-rate encryption
- Designed for ACI spine or NX-OS aggregation roles
- Cloud-scale ASIC for consistent latency and rich QoS
- Hot-swappable module for rapid serviceability

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

- Product type: Modular switch line card (data center)
- Port density: 36 x 100G
- Port form factor: QSFP28
- Hardware encryption: MACsec (FX3 generation)
- Operational roles: NX-OS aggregation, Cisco ACI spine
- Hot-swappable: Yes
- Compatible chassis: Cisco Nexus 9500 Series (e.g., 9504/9508/9516) with compatible supervisors/fabric modules
- Transceiver support: QSFP28 100G optics (e.g., SR4/LR4/PSM4/CWDM4 per platform matrix)
- Typical wavelengths: 850 nm (SR4), 1310 nm (LR4/CWDM4)
- Typical connectors: MPO-12 (SR4/PSM4), duplex LC (LR4/CWDM4)
- Use cases: Secure 100G spine, encrypted DC interconnect, high-density aggregation

FAQs

Q: Is MACsec supported on all 100G ports?
A: Yes, the FX3 generation provides hardware MACsec. Actual coverage and features depend on software release and licensing—validate in the platform feature matrix.

Q: Can this card be used in both NX-OS and ACI?
A: Yes. It supports NX-OS standalone deployments and Cisco ACI fabrics (spine role), subject to system configuration.

Q: What optics are recommended?
A: Use QSFP28 optics matched to distance and media: SR4 for short MMF, LR4/CWDM4 for SMF long reach. Verify exact support with your supervisor and fabric modules.

Q: Which chassis are compatible?
A: Cisco Nexus 9500 Series chassis (9504/9508/9516) with compatible supervisors/fabrics for FX3 line cards.

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