Cisco C9400-LC-24S Full Product Description

1. Short Overview

Suffix Breakdown

• C9400: Catalyst 9400 modular core/aggregation switch platform
• LC: Line Card modular access/uplink module
• 24: Total 24 physical front-facing ports
• S: SFP-only Gigabit fiber port interface (distinguished from 10G SFP+ LC-24XS and 25G SFP28 LC-24XY)

Core Differentiators

1. vs C9400-LC-24XS: LC-24S only supports 1G SFP transceivers; LC-24XS supports 1G/10G dual-speed SFP/SFP+
2. vs copper PoE line cards (C9400-LC-48H/48HN): Pure fiber module without inline PoE power, optimized for long-distance fiber uplink instead of end-user access
3. vs C9400-LC-48S: Half port density (24 vs 48), lighter power consumption, suitable for small-scale fiber aggregation pods

2. Key Hardware Specifications

Port & Bandwidth Parameters

1. Port Count: 24 independent hot-pluggable SFP slots, all non-blocking full-duplex 1Gbps
2. Native Port Speed: 100BASE-FX / 1000BASE-SX/LX/EX/ZX Gigabit Ethernet
3. Supported Transceiver Types
   • Optical SFPs: Short-range multimode, long-range single-mode, extended long-haul fiber SFPs
   • Cu-SFP modules: 10/100/1000BASE-T copper SFP for short-distance RJ45 connectionsCisco
4. Per-Slot Backplane Bandwidth
   • With C9400-SUP-1 Gen1 Supervisor: 80 Gbps slot bandwidth, 3:1 oversubscription
   • With C9400-SUP-1XL / C9400X-SUP-2XL Gen2/3 Supervisors: Up to 240 Gbps slot bandwidth for full wire-speed forwardingCisco
5. Full-Duplex Non-Blocking Throughput: 24 Gbps aggregate bidirectional capacity for all 24 ports simultaneouslyCisco
6. Jumbo Frame Support: Layer 2–4 jumbo frames up to 9216 bytes for large data transmission efficiencyCisco

Physical & Power Parameters

• Form Factor: Standard Catalyst 9400 full-width line card, compatible with all empty line card slots of C9404R / C9407R / C9410R chassis
• Maximum Power Consumption: 120W typical full-load power draw
• MTBF Rating: 1,104,470 hours under nominal operating environment
• Built-in Asset Tag: Front-mounted passive UHF RFID tag for network asset lifecycle managementCisco
• Cooling: Passive heat sink + chassis shared side-to-side airflow cooling; no independent fan on line card
• No PoE Function: This module does not provide any 802.3af/at/bt inline power for end devicesCisco

Chassis Maximum Port Density Matching

Supervisor Compatibility

3. Front Panel Layout & Status Indicators

1. 24 SFP port slots arranged in two rows (12 ports per row)
2. Per-port bi-color LED indicators for each SFP slot:
   • Green steady: Link established, normal operation
   • Green blink: Active data transmission/reception
   • Amber: Fault, transceiver missing, link down or error alarm
3. Global line card status LED at card edge:
   • Green: Line card detected, online and operational
   • Amber: Booting, initialization or minor hardware fault
   • Red: Critical module failure, backplane communication error
4. Ejector levers on both sides for OIR hot insertion/removal without chassis power-off

4. IOS XE Software Feature Support

Layer 2 Switching Features

• IEEE 802.1Q VLAN trunking (4096 VLANs), PVLAN private VLAN segmentation
• LACP/PAGP cross-line-card EtherChannel link aggregation
• STP/RSTP/MSTP loop prevention suite (BPDU guard, root guard, uplink fast)
• DHCP Snooping, DAI Dynamic ARP Inspection, MAC address port security
• IEEE 802.3az Energy Efficient Ethernet for idle port power saving

Layer 3 & SD-Access Fabric Features

• Hardware IPv4/IPv6 unicast/multicast routing, static routes, OSPF, EIGRP, BGP
• 32-way ECMP equal-cost multi-path uplink load balancing
• VXLAN EVPN hardware forwarding for Cisco SD-Access enterprise fabric
• Anycast gateway, LISP host mobility, fabric border node uplink aggregation
• Hardware VRF-lite multi-tenancy segmentation (up to 1000 independent VRF instances)

Security & QoS Capabilities

• 8 hardware priority queues per port, WRR/DRR congestion scheduling, traffic policing/marking/shaping
• Hardware ACL L2/L3/L4 policy enforcement, CoPP control plane protection
• TrustSec SGT tag end-to-end policy propagation, Encrypted Traffic Analytics (ETA)
• IEEE 802.1X wired authentication, MAB, WebAuth access control
• Secure boot, encrypted configuration, AAA TACACS+/RADIUS/LDAP authentication

Automation & Observability

• NETCONF, RESTCONF, YANG model-driven programmability, POAP zero-touch provisioning
• Real-time streaming telemetry, IPFIX flow export, continuous port latency/buffer monitoring
• GOLD online diagnostic tests for non-disruptive line card health inspection
• Full Cisco DNA Center lifecycle management integration

5. Typical Deployment Scenarios

1. Large Campus Inter-Building Fiber Aggregation
   24-port 1G SFP ports connect remote campus buildings via single/multimode fiber, cross-card EtherChannel provides redundant inter-building uplinks to core C9400 chassis, SD-Access EVPN fabric traffic aggregation.
2. Medium Data Center Leaf Downlink / Storage Uplink
   Short-range 1G fiber connections to storage arrays, rack top switches and low-speed server clusters, isolated VRF segmentation for multi-tenant workloads.
3. Industrial Smart Building IoT Backbone
   Long-distance fiber links connect distributed industrial IoT controllers, IP camera subnets and building automation gateways; hardware QoS prioritizes low-latency industrial control traffic, TrustSec segmentation isolates IoT subnets from corporate user networks.
4. Hybrid Cloud Edge Uplink Aggregation
   Cost-effective Gigabit fiber uplinks to service provider routers, redundant EtherChannel design ensures resilient hybrid cloud connectivity.

6. Standard Package Contents of C9400-LC-24S SKU

Items Not Included (Separate Purchase Required)

• SFP optical transceivers (SX/LX/EX/ZX) or Cu-SFP copper modules
• Single/multi-mode fiber patch cords, Twinax copper cables
• Catalyst 9400 series chassis, supervisors, power supplies and fan tray

Short Commercial Catalog Summary for Quotation