Cisco Catalyst 9400 Series 24-Port 10 Gigabit Ethernet SFP+ Line Card
24x 10G SFP+MACsec-256Hot-swappableC9400 chassis
The Cisco C9400-LC-24XS= is a 24-port 10 Gigabit Ethernet SFP+ line card for the Catalyst 9400 modular switch family, used to add high-density 10G fibre aggregation or collapsed-access ports to an existing C9404R, C9407R or C9410R chassis. Each port accepts a 10G SFP+ or 1G SFP module, and both types can be mixed on the same card without restrictions.
The "=" suffix marks it as a spare part: it is supplied on its own for upgrades, expansions or replacements in a chassis you already run. It fits any non-supervisor slot and supports hot swapping, so you can add it without powering down the switch.
Before you order: The bandwidth each card actually gets depends on your supervisor and chassis: with Sup-1 every slot gets 80 Gbps (3:1 oversubscribed), with Sup-2 240 Gbps and with Sup-2XL 480 Gbps (line rate). It requires Cisco IOS XE 16.6.2 or later. Tell us your chassis and supervisor and we will confirm the throughput.
What's in the Box
- Cisco C9400-LC-24XS= line card
- Not included: SFP/SFP+ transceivers, chassis, supervisor, slot blank covers (C9400-S-BLANK)
What It Means in Practice
- Turns one chassis slot into 24 x 10G fibre ports — e.g. for building uplinks or server connections.
- Line rate on all 24 ports needs Sup-2/Sup-2XL (or Sup-1XL in the C9404R); with Sup-1 the card is 3:1 oversubscribed, which is usually fine for access aggregation.
- MACsec-256 in hardware encrypts links between buildings or to the core.
- Maximum per chassis: 48 ports in a C9404R, 120 in a C9407R, 192 in a C9410R.
What Will Not Work
- It does not fit Catalyst 4500-E, 9500, 9600 or 9300 switches — only Catalyst 9400 chassis.
- It does not run 25G (that is the C9400-LC-24XY) and provides no PoE.
- It cannot be installed in a supervisor slot.
- Transceivers are not included.
Key Features
Mixed 1G/10G
Each port takes SFP+ or SFP; mix freely on the same card.
MACsec-256
Hardware link encryption on every port.
Hot-swap and OIR
Insert or remove with the chassis running; automatic diagnostics and discovery.
Investment protection
Works with Sup-1, Sup-1XL, Sup-1XL-Y, Sup-2 and Sup-2XL.
Technical Specifications
| Identification |
| Part Number |
C9400-LC-24XS= |
| Brand |
Cisco |
| Series |
Catalyst 9400 |
| Type |
Line card, spare |
| Ports |
| Interfaces |
24x 10GE SFP+ / 1GE SFP |
| MACsec |
IEEE 802.1AE, MACsec-256 |
| Jumbo frames |
9,216 bytes |
| EtherChannel |
LACP, up to 16 ports |
| Compatibility |
| Chassis |
C9404R, C9407R, C9410R |
| Supervisors |
C9400-SUP-1, SUP-1XL, SUP-1XL-Y, C9400X-SUP-2, SUP-2XL |
| Slot |
Any non-supervisor slot |
| Software |
Cisco IOS XE 16.6.2 or later |
| Bandwidth per slot |
| Sup-1 |
80 Gbps (3:1) |
| Sup-1XL |
240 / 120 / 80 Gbps in 9404R / 9407R / 9410R |
| Sup-2 |
240 Gbps |
| Sup-2XL |
480 Gbps (1:1) |
| Physical |
| Max power |
200 W |
| Dimensions (H x W x D) |
4.06 x 37.9 x 37.0 cm |
| Operating temperature |
-5 to 45 °C |
| MTBF |
545,080 hours |
| Warranty |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
Cisco Enhanced Limited Lifetime Hardware Warranty — claims handled through Singular |
Frequently Asked Questions
Will it work in my Catalyst 4500-E?
No. It fits Catalyst 9400 chassis only (C9404R, C9407R, C9410R).
Do I need to upgrade the supervisor?
No — it works with Sup-1 upward. A faster supervisor only raises the per-slot bandwidth.
Which optics can I use?
Cisco 1G SFP and 10G SFP+ modules listed in the Cisco Transceiver Compatibility Matrix; tell us the distance and fibre type and we will match them.
Singular Expert Insight · Buyer's Guide
The C9400-LC-24XS= is the straightforward way to add 10G fibre density to a Catalyst 9400 you already own. Before ordering, check your supervisor — it decides whether you get 80, 240 or 480 Gbps per slot — and order the optics together. See our
network switches range for fixed-port alternatives.
✓ Buy it if you run a Catalyst 9400 chassis and need 24 more 10G/1G fibre ports.
✕ Skip it if you need 25G ports (choose C9400-LC-24XY) or copper/PoE ports.
→ Also consider the C9400-LC-24XY for 10/25G SFP28 ports with Sup-2.
Send us your chassis model, supervisor and IOS XE version and we will confirm compatibility before you order.