C9300X-NM-4C – 4x100G/40G QSFP28 Module – Catalyst 9300X

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C9300X-NM-4C Description

The C9300X-NM-4C is a Cisco Catalyst 9300X network module for high-density 40G and 100G uplinks. It provides four dual-rate QSFP28 ports that run at 100G or 40G and installs in the uplink slot of C9300X-24Y, C9300X-48HX and C9300X-48TX switches. Standard Catalyst 9300 switches do not support it, and it requires Cisco IOS XE Bengaluru 17.6.1 or later.

Quick Specs

Parameter

Specification

Product ID

C9300X-NM-4C

Product type

Network module

Cisco ordering description

Catalyst 9300 4 x 100G/40G dual rate QSFP28 network module

Total ports

4

Supported port speeds

100G and 40G

Module slots

Four 40 GE/100 GE slots

Connector type

QSFP+ connector in each slot

Supported platforms

C9300X-24Y, C9300X-48HX, and C9300X-48TX

Standard Catalyst 9300 support

Not supported on standard Catalyst 9300 models

Minimum software release

Cisco IOS XE Bengaluru 17.6.1

Spare SKU

C9300X-NM-4C=

Installation type

Field-replaceable network module

Application Scenarios

Four 100G Uplinks Per Switch

An access switch at the edge of a campus backbone uses all four QSFP28 ports to build redundant 100G links toward two aggregation switches.

Uplinks For A 10G Access Closet

A C9300X-48TX closet with 48 multigigabit downlinks uses the four ports to keep the uplink bandwidth in step with the downlink speed.

Product Comparison

Parameter

C9300X-NM-4C

C9300X-NM-2C

C9300X-NM-8Y

C9300X-NM-8M

Number of ports

4

2

8

8

Port speed

100G / 40G

100G / 40G

25G / 10G / 1G

10G / 1G

Port type

QSFP28 (dual-rate)

QSFP28 (dual-rate)

SFP28

Copper Ethernet (Multigigabit)

Supported platforms

C9300X-24Y, C9300X-48HX, C9300X-48TX

Catalyst 9300X Series switches

Catalyst 9300X Series switches

Catalyst 9300X Series switches

Minimum software release

Cisco IOS XE 17.6.1

Cisco IOS XE 17.5.1

Cisco IOS XE 17.5.1

Cisco IOS XE 17.5.1

C9300X-NM-4C offers four 100G/40G QSFP ports where C9300X-NM-2C offers two, but it is listed only for C9300X-24Y, C9300X-48HX and C9300X-48TX, and it needs Cisco IOS XE 17.6.1 against 17.5.1 for C9300X-NM-2C. A Catalyst 9300X host outside those three, or a design that needs only two uplinks, should use C9300X-NM-2C. Uplinks on 1G, 10G or 25G SFP optics need C9300X-NM-8Y, with eight SFP28 ports. Copper multigigabit uplinks at 10G or 1G need C9300X-NM-8M, which also has eight ports and uses standard Ethernet cabling.

Ordering Checklist

  • Catalyst 9300X hosts: Use the module in C9300X-24Y, C9300X-48HX and C9300X-48TX. Other Catalyst 9300X models are not listed for this four-port module, and standard Catalyst 9300 models take C9300-NM modules instead.

Specifications

Parameter Specification Parameter Specification
Product ID C9300X-NM-4C Product type Network module
Cisco ordering description Catalyst 9300 4 x 100G/40G dual rate QSFP28 network module Total ports 4
Supported port speeds 100G and 40G Module slots Four 40 GE/100 GE slots
Connector type QSFP+ connector in each slot Supported platforms C9300X-24Y, C9300X-48HX, and C9300X-48TX
Minimum software release Cisco IOS XE Bengaluru 17.6.1 Spare PID C9300X-NM-4C=
Installation type Field-replaceable network module

Quality Certifications

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    Plugged it in and everything just worked. No surprises.

    Janet Fisher
    Posted on 03/12/2025
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    5.0

    International shipping was smooth. Proper documentation included.

Questions & Answers

  • Which Catalyst 9300X switches accept C9300X-NM-4C?

    C9300X-NM-4C installs in the uplink slot of C9300X-24Y-A, C9300X-24Y-E, C9300X-48HX-A, C9300X-48HX-E, C9300X-48TX-A and C9300X-48TX-E switches. Other Catalyst 9300X models are not listed for this four-port module, and standard Catalyst 9300 models do not support the module either.
  • Which Cisco IOS XE release does C9300X-NM-4C need?

    C9300X-NM-4C requires Cisco IOS XE Bengaluru 17.6.1 or later. Standard Catalyst 9300 switches do not support the module, so the host must be a Catalyst 9300X switch that is running that release or a later one.
  • Can C9300X-NM-4C be installed in a C9300X-48HXN-A or C9300X-48HXN-E?

    No. The Catalyst 9300 data sheet lists C9300X-NM-4C only for C9300X-48HX-A, C9300X-48HX-E, C9300X-48TX-A, C9300X-48TX-E, C9300X-24Y-A and C9300X-24Y-E, and its Table 3 note excludes C9300X-48HXN-A and C9300X-48HXN-E. An older hardware installation guide text names C9300X-24Y-A and C9300X-24Y-E alone, and the newer data sheet takes precedence. Other C9300X-NM modules work on both C9300X-48HXN-A and C9300X-48HXN-E with a reduced port count.
  • Do the 100G ports on C9300X-NM-4C support IPsec?

    Yes. The 100G ports of C9300X-NM-4C appear as HundredGigE interfaces on a Catalyst 9300X host and support IPsec at up to 100G line rate. IPsec needs the DNA Advantage license tier and the HSECK9 license. Confirm both are ordered on the C9300X-24Y-A, C9300X-24Y-E, C9300X-48HX-A, C9300X-48HX-E, C9300X-48TX-A or C9300X-48TX-E before planning encrypted 100G uplinks.
  • Do the ports on C9300X-NM-4C provide PoE?

    No. Cisco lists no PoE on the Catalyst 9300X uplink modules, so the four QSFP28 ports of C9300X-NM-4C carry data only. Power over Ethernet stays on the downlink ports of the host switch, and the module needs no separate power configuration.
  • What peak power does a Catalyst 9300X draw with C9300X-NM-4C installed at 100% PoE load?

    In the Catalyst 9300 data sheet power test with a Platinum supply, a Catalyst 9300X switch with C9300X-NM-4C installed reaches a peak of 939.8W at 100% PoE load and 115Vac. Use this value when sizing circuits and power supplies, and read the data sheet row for the exact host model.

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DataSheet Downloads

  • C9300X-NM-4C Datasheet