The Cisco Catalyst C9500-24Y4C-A is a high-performance, fixed-core Layer 2/3 switch, part of the Catalyst 9500 Series, optimized for enterprise campus core and aggregation layers. It features 24 x 25 Gigabit Ethernet (SFP28) ports and 4 x 100 Gigabit Ethernet (QSFP28) uplinks. The "A" license variant offers Network Advantage, enabling advanced routing, segmentation, and automation features. Built with high availability, programmability, and scalability in mind, the C9500-24Y4C-A is ideal for multi-gigabit backbones and SD-Access architectures.
Product Details
| Attribute | Description |
| Product Name | C9500-24Y4C-A |
| Brand | Cisco Systems |
| Port Configuration | 24 x 25G SFP28 + 4 x 100G QSFP28 |
| Switching Capacity | 2.4 Tbps |
| Forwarding Rate | 1.2 Bpps |
| Form Factor | 1RU fixed core switch |
| Software License | Network Advantage (A) |
| Operating System | Cisco IOS XE |
| Airflow | Front-to-back or back-to-front (model dependent) |
| Ideal Deployment | Enterprise core, aggregation, SD-Access, multigig campus backbone |
Key Features
24 high-speed 25G SFP28 ports for high-density access or aggregation
4 x 100G QSFP28 uplinks with support for breakout to 4 x 25G
Powered by Cisco UADP ASIC, enabling hardware-based forwarding
Runs Cisco IOS XE with programmable interface (NETCONF, RESTCONF, gRPC)
StackWise Virtual and In-Service Software Upgrade (ISSU) support
Integrated trustworthy solutions, MACsec, and segmentation policies
Network Advantage license includes full routing stack: OSPF, BGP, EIGRP, VRF, MPL
Ideal for 25G-to-100G aggregation, SD-Access fabric, and core enterprise networks
Technical Specifications
| Specification | Value |
| Ports | 24 x 25G SFP28 + 4 x 100G QSFP28 |
| Switching Capacity | 2.4 Tbps |
| Forwarding Rate | 1.2 billion packets per second |
| Software License | Network Advantage (A) |
| MAC Addresses | 128K |
| VLAN IDs | 4096 |
| DRAM | 16 GB |
| Flash Memory | 16 GB |
| Power Supply | Dual, redundant (AC or DC supported) |
| Dimensions | 1RU, 1.72 x 17.5 x 21.5 in |
| Operating System | Cisco IOS XE |
| Redundancy | N+1 fans and power |
Similar Models Comparison
| Model | Ports | Switching Capacity | License Type | Use Case |
| C9500-24Y4C-A | 24 x 25G + 4 x 100G | 2.4 Tbps | Network Advantage | Enterprise core/aggregation |
| C9500-48Y4C-A | 48 x 25G + 4 x 100G | 3.2 Tbps | Network Advantage | High-density core switching |
| C9500-24Q-A | 24 x 40G | 960 Gbps | Network Advantage | Legacy 40G aggregation |
| C9500-32C-A | 32 x 100G | 6.4 Tbps | Network Advantage | Data center/core backbone |
