Cisco C9300X-NM-4C=

The Cisco Catalyst C9300X-NM-4C= is a 4-port 40G/100G QSFP+/QSFP28 hot-swappable network module designed exclusively for Cisco Catalyst 9300X Series switchesCisco. The trailing = signifies this is a standalone spare/replacement SKU for field upgrades, expansion, or hardware maintenance.
This high-speed module delivers 400 Gbps full-duplex aggregate bandwidth to address the most demanding enterprise core, aggregation, and data center edge connectivity requirements.

Features & Benefits

Ultra-High-Speed Uplinks: 4 x QSFP28 ports supporting 100 Gbps (100GBase-X) and 40 Gbps (40GBase-X) dual-speed operation.
Total Aggregate Bandwidth: 400 Gbps full-duplex for non-blocking, high-density switching.
Hot-Swappable Design: Fully field-replaceable without powering down the switch, ensuring zero network downtime.
Wide Media Compatibility: Supports all standard Cisco QSFP+ (40G) and QSFP28 (100G) optical transceivers (SR4, LR4, ER4), direct-attach copper (DAC) cables, and active optical cables (AOC).
Hardware-Based Security: Leverages the Catalyst 9300X's UADP 2.0sec ASIC to enable line-rate 100G IPsec encryption for secure data transit.
Investment Protection: Seamlessly supports existing 40G infrastructure while enabling a clear path to 100G migration.
Spare Part SKU: Identical hardware performance to the standard C9300X-NM-4C, packaged and sold separately for serviceability.

Technical Specifications

Parameter	Specification
Port Configuration	4 x Dual-speed QSFP+/QSFP28 ports
Supported Data Rates	100 Gbps, 40 Gbps
Aggregate Bandwidth	400 Gbps (full-duplex)
Module Type	Hot-swappable Type 2 network module (Spare)
Compatibility	Cisco Catalyst 9300X Series only (C9300X-24Y, C9300X-48TX, C9300X-48HX)
Software Requirement	Cisco IOS-XE 17.3.1 or later
SKU Definition	C9300X-NM-4C=: Spare / Replacement Part
Typical Applications	Enterprise Core/Aggregation, Data Center Interconnect (DCI), High-Speed Server Uplinks, Wi-Fi 6E Backhaul