C9300X-NM-8M – 8x10G/mGig Copper Module – Catalyst 9300X

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C9300X-NM-8M Description

C9300X-NM-8M is a Cisco Catalyst 9300X field-replaceable network module for copper multigigabit uplink expansion. It provides eight 10G/1G multigigabit Ethernet copper ports, Catalyst 9300X Series platform scope, no support on standard Catalyst 9300 models, Cisco IOS XE Bengaluru 17.5.1 introductory release, and spare SKU C9300X-NM-8M=. HXN switch variants have documented usable-port behavior under IOS XE 17.8.1 and earlier releases. The module adds mGig uplink or aggregation ports to compatible Catalyst 9300X switches.

Quick Specs

Parameter

Specification

Product ID

C9300X-NM-8M

Product type

Network module

Cisco ordering description

Catalyst 9300X 8 x 10G/mGig copper Network Module

Port Count

8

Port Type

Multigigabit Ethernet copper

Listed Speed Class

10G/1G Multigigabit

Supported Platform

Cisco Catalyst 9300X Series switches

Standard Catalyst 9300 Support

Not supported on standard Catalyst 9300 models

Introductory Release

Cisco IOS XE Bengaluru 17.5.1

HXN Usable Ports

Ports 1 to 6 usable on Cisco IOS XE 17.8.1 and later; ports 7 and 8 disabled

Earlier HXN Release Behavior

Ports 1 to 4 usable on Cisco IOS XE 17.7.1 and earlier

Spare SKU

C9300X-NM-8M=

Installation Type

Field-replaceable network module

Application Scenarios

Copper multigigabit expansion for Catalyst 9300X

Use C9300X-NM-8M when a Catalyst 9300X deployment needs copper multigigabit module ports instead of SFP or QSFP optical uplinks.

Access-layer designs that keep copper cabling

Choose this module when the project needs modular copper connectivity and wants to avoid changing the physical uplink media to fiber optics. Verify cable type and supported speeds before ordering.

Replacement or spare planning for Catalyst 9300X modules

C9300X-NM-8M fits projects that already standardize on the 8-port mGig module for Catalyst 9300X. For spare-part ordering, confirm whether the quote should use C9300X-NM-8M=.

Product Comparison

Parameter

C9300X-NM-8M

C9300X-NM-8Y

C9300X-NM-2C

C9300X-NM-4C

Product type

Multigigabit copper network module

SFP28 network module

QSFP28 network module

QSFP28 network module

Port Count

8

8

2

4

Supported Port Speeds

10G/1G Multigigabit

25G/10G/1G

100G/40G

100G/40G

Connector or Port Type

Copper Ethernet

SFP28

QSFP+ connector / QSFP28 ordering description

QSFP+ connector / QSFP28 ordering description

Supported Platform

Catalyst 9300X Series switches

Catalyst 9300X Series switches

Catalyst 9300X Series switches

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

Introductory Release

Cisco IOS XE 17.5.1

Cisco IOS XE 17.5.1

Cisco IOS XE 17.5.1

Cisco IOS XE 17.6.1

HXN Port Limitation

Ports 1 to 6 usable on 17.8.1 and later

Ports 1 to 6 usable on 17.8.1 and later

Ports 1 and 2 usable on 17.8.1 and later

Not listed in the HXN limitation table

Spare SKU

C9300X-NM-8M=

C9300X-NM-8Y=

C9300X-NM-2C=

C9300X-NM-4C=

  • Choose C9300X-NM-8M when the Catalyst 9300X expansion requirement is copper multigigabit Ethernet.
  • Choose C9300X-NM-8Y when the same switch needs SFP-based 1G, 10G, or 25G fiber uplinks.
  • Choose C9300X-NM-2C or C9300X-NM-4C when the design needs 40G or 100G QSFP uplinks instead of copper ports.
  • For Catalyst 9300X-HXN switches, verify usable-port limits before selecting the 8-port module.

Selection Guide

1. Choose C9300X-NM-8M for copper mGig module ports

Select C9300X-NM-8M when the Catalyst 9300X switch needs eight modular copper multigigabit Ethernet ports and the cabling plan is based on copper rather than optical media.

2. Choose C9300X-NM-8Y for fiber SFP28 uplinks

If the uplink design uses SFP, SFP+, or SFP28 optics at 1G, 10G, or 25G, compare C9300X-NM-8Y instead of quoting the copper mGig module.

3. Choose C9300X-NM-2C or C9300X-NM-4C for 100G uplinks

If the requirement is QSFP-class 40G or 100G uplink capacity, use C9300X-NM-2C or C9300X-NM-4C depending on required port count and supported switch model.

4. Confirm HXN port limits and cable plan before purchase

Before ordering, verify whether the switch is a Catalyst 9300X-HXN model, confirm the Cisco IOS XE release, and check that the copper cabling plan matches the required link speeds.

Ordering Checklist

Check Item

What to Confirm

Why It Matters

Switch Model

Catalyst 9300X Series switch

Confirms the module is being ordered for the supported platform family

Standard C9300 vs C9300X

Whether the switch is Catalyst 9300X or standard Catalyst 9300

C9300X-NM modules are not for standard Catalyst 9300 switches

Media Type

Copper multigigabit Ethernet

Confirms that C9300X-NM-8M is the correct module type

Port Count

Eight copper module ports

Determines whether the 8-port mGig module matches the design

IOS XE Release

Cisco IOS XE 17.5.1 or later for module introduction

Confirms the software baseline can support the module

HXN Deployment

Whether the switch is Catalyst 9300X-HXN

HXN models have usable-port limits for C9300X-NM-8M

Cable Plan

Copper cabling type and required link speeds

Prevents ordering a copper module that does not match the cabling design

Spare Requirement

C9300X-NM-8M or C9300X-NM-8M=

Prevents confusion between base module and spare-part ordering

Specifications

Parameter Specification Parameter Specification
Product ID C9300X-NM-8M Product type Network module
Cisco ordering description Catalyst 9300X 8 x 10G/mGig copper Network Module Port Count 8
Port Type Multigigabit Ethernet copper Listed Speed Class 10G/1G Multigigabit
Supported Platform Cisco Catalyst 9300X Series switches Introductory Release Cisco IOS XE Bengaluru 17.5.1
HXN Usable Ports Ports 1 to 6 usable on Cisco IOS XE 17.8.1 and later; ports 7 and 8 disabled Earlier HXN Release Behavior Ports 1 to 4 usable on Cisco IOS XE 17.7.1 and earlier
Spare Part Number C9300X-NM-8M= Installation Type Field-replaceable network module
Standard Catalyst 9300 Support Not supported on standard Catalyst 9300 models    

Get More Information

Need pricing, stock, or shipping details for the C9300X-NM-8M ? Layer23-Switch can help you check current availability, lead time, and delivery options for this. Send us the part number, quantity, and destination country via live chat or email sales@layer23-switch.com for a fast quotation.

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    Samantha Howard
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    They flagged a detail we missed in our spec. Saved us from ordering wrong. Invoice formatting was a bit different from what our AP system expects, but workable.

    Julie Moreno
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    Our monitoring shows clean baseline performance since installation.

    Roy Warren
    Posted on 29/12/2025
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    Been ordering from Layer23 for multiple projects now. Reliable partner.

Questions & Answers

  • Which switches support C9300X-NM-8M?

    C9300X-NM-8M is supported on Cisco Catalyst 9300X Series switches. Standard Catalyst 9300 models use a different network-module family.
  • Is C9300X-NM-8M compatible with standard Catalyst 9300 models?

    No, C9300X-NM-8M is not compatible with standard Catalyst 9300 models. The module belongs to the Cisco Catalyst 9300X Series.
  • Which Cisco IOS XE release introduced C9300X-NM-8M?

    C9300X-NM-8M was introduced with Cisco IOS XE Bengaluru 17.5.1. Catalyst 9300X-HXN deployments also need the release-specific usable-port limits checked.
  • How does C9300X-NM-8M differ from C9300X-NM-8Y?

    C9300X-NM-8M provides 8 copper multigigabit ports, while C9300X-NM-8Y provides 8 SFP28 slots for fiber or direct-attach media. The cabling plan determines which module fits.
  • What type of Catalyst 9300X network module is C9300X-NM-8M?

    C9300X-NM-8M is a field-replaceable Catalyst 9300X module with 8 copper multigigabit ports. It supports the listed 10G/1G Multigigabit speed class instead of SFP or QSFP optics.
  • How many copper ports does C9300X-NM-8M provide?

    C9300X-NM-8M provides 8 multigigabit Ethernet copper ports in the listed 10G/1G Multigigabit class. Copper cabling must match the required link speed.

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