C9300-NM-4G - Cisco C9300 4x1G Network Module

Cisco C9300-NM-4G — Catalyst 9300 4-Port Multigigabit Network Module

What it is

C9300-NM-4G is an expansion network module for the Cisco Catalyst 9300 Series switches.
It adds 4 multigigabit Ethernet ports to a compatible 9300 chassis, allowing connectivity at 1G, 2.5G, 5G, or 10G speeds depending on device and cabling — ideal for uplinks, access aggregation, and high-speed edge connections.

Why buyers pick C9300-NM-4G (plain English)

Flexible multigig speed support
Supports 1G/2.5G/5G/10G (depending on platform and cabling) to match evolving network demands without replacing hardware.

Modular expandability
Installs cleanly in the Catalyst 9300’s network module slot to add additional port density or uplink capacity.

Optimized for edge and uplinks
Perfect for stacking, aggregation links, or connecting multigig-capable endpoints like Wi-Fi 6/6E APs and servers.

Cisco IOS-XE integration
Managed through the same IOS-XE interface as the base switch for consistent provisioning and monitoring.

Ideal for evolving enterprise LANs
Supports flexible bandwidth growth while maintaining Catalyst feature consistency.

60-second spec box (C9300-NM-4G)

Module type
Network module for Catalyst 9300

Ports
4 × multigigabit Ethernet

Speed support
1G / 2.5G / 5G / 10G (platform dependent)

Connector type
RJ-45

Form factor
C9300 network module

Managed by
Cisco IOS-XE

Use case
Multigig uplinks, high-speed access aggregation, AP backhaul.

Where it fits (and when to choose something else)

Perfect for:

• Expanding port density on Catalyst 9300 switches

• Multigig-aware networks (connectivity for Wi-Fi 6/6E APs)

• High-speed uplinks in campus access environments

• Flexible edge deployments needing variable line rates

Choose something else if:

• You need fiber optics → SFP/SFP+ uplink modules

• You need 40G/100G speeds → higher-speed network modules

• You want fixed ports → upgrade to a chassis with native multigig

TL;DR

C9300-NM-4G is an expansion network module for Catalyst 9300 switches with four multigigabit RJ-45 ports — perfect for adding flexible 1G-10G connectivity to enterprise access deployments.