Cisco C9300X-NM-8Y — Catalyst 9300X 8-Port 25G/10G/1G SFP28 Network Module
What it is
C9300X-NM-8Y is a Cisco Catalyst 9300X Series uplink network module that adds 8 × multi-rate SFP28 ports to compatible Catalyst 9300X switches.
Each port supports 25 Gigabit Ethernet, 10 Gigabit Ethernet, or 1 Gigabit Ethernet, giving you a flexible high-speed fiber uplink option for campus aggregation, distribution, core connectivity, and switch-to-switch links.
Why buyers pick C9300X-NM-8Y (plain English)
Eight 25G uplinks: Provides up to eight high-speed 25GbE connections from a single Catalyst 9300X switch.
Multi-rate flexibility: The same ports can operate at 25G, 10G, or 1G, so you can mix link speeds as your network evolves.
SFP28 form factor: Supports compact fiber and DAC connectivity without moving to larger QSFP modules.
Ideal upgrade path from 10G: Lets customers deploy 10G today and move individual links to 25G later without replacing the uplink module.
Built specifically for Catalyst 9300X: Designed for the modular uplink slot on compatible C9300X switches.
60-second spec box (C9300X-NM-8Y)
Ports
- 8 × SFP28 ports
- Multi-rate optical / DAC interfaces
Supported speeds
- 25 Gigabit Ethernet
- 10 Gigabit Ethernet
- 1 Gigabit Ethernet
- Speed determined by installed transceiver or cable and configuration
Interface type
-
SFP28 for 25GbE
- Supports compatible SFP+ modules for 10GbE
- Supports compatible SFP modules for 1GbE
- Hot-swappable optics
Typical optics / cabling
- 25G SFP28 transceivers
- 10G SFP+ transceivers
- 1G SFP transceivers
- Direct Attach Copper (DAC)
- Active Optical Cables (AOC)
- Multimode or single-mode fiber depending on optic
Performance
- Line-rate operation on supported ports
- Up to 25Gbps per interface
- Up to 200Gbps aggregate raw port bandwidth across eight 25G interfaces
Compatibility
- Designed for Cisco Catalyst 9300X Series
- C9300X network modules are not interchangeable with standard C9300 network modules
- Port availability can vary on certain C9300X models
Hot swap
- Network module is hot-swappable / OIR capable
- Can be inserted or replaced without shutting down the entire switch when supported operational procedures are followed
Where it fits (and when to choose something else)
Perfect for:
- Catalyst 9300X switches needing 25G uplinks
- High-density enterprise campus networks
- Access-to-distribution connections
- Server and storage connectivity
- Networks migrating from 10G to 25G
- Deployments needing several high-speed fiber links
Choose something else if:
- You need 100G / 40G uplinks → choose C9300X-NM-2C or C9300X-NM-4C
- You need 10G multigigabit RJ-45 copper → choose C9300X-NM-8M
- You only need standard 10G SFP+ → a lower-cost uplink option may be sufficient
- You have a standard Catalyst 9300 rather than a 9300X → use the appropriate C9300-NM module
TL;DR
C9300X-NM-8Y is a Cisco Catalyst 9300X uplink network module with 8 × SFP28 ports supporting 25G, 10G, or 1G Ethernet — ideal for high-speed fiber aggregation and networks transitioning from 10GbE to 25GbE.
