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C9300-NM-2Y
2×25G uplink module – Cisco Catalyst 9300
C9300-48UB-A – 48 Ports UPOE modular uplinks – access switch
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C9300-48UB-A Description
C9300-48UB-A is a feature-rich access switch with 48 × 1 Gb UPOE ports (60 W per port) and 10 Gb / 25 Gb uplinks for high-speed aggregation. It features a 256 Gbps non-blocking switching fabric, ensuring smooth forwarding at 190.48 Mpps, even under full PoE load. The 64 MB packet buffer enhances performance during traffic bursts, reducing packet loss in environments with high congestion or large file transfers. StackWise-480 enables up to eight switches to operate as a single unit with 736 Gbps total stack bandwidth and sub-50 ms fail-over. The Network Advantage license unlocks advanced Layer 3 routing, SD-Access micro-segmentation, and Encrypted Traffic Analytics (ETA). Dual 1100 W AC power supplies provide up to 445 W PoE budget to power demanding devices, while redundant fans ensure reliable cooling.
Product Performance
Ethernet Ports
Switching Capacity
Forwarding Rate
Model decoding
|
Code |
Meaning |
|---|---|
|
C |
Cisco Catalyst series |
|
9300 |
Enterprise next-generation stackable access platform |
|
48 |
48 downlink ports |
|
U |
Cisco UPOE (60 W per port) |
|
B |
Larger packet buffer (64 MB) compared to standard models |
|
-A |
Network Advantage software license (full Layer 3 routing, SD-Access, ETA, and automation) |
Quick Specs
|
C9300-48UB-A |
Specification |
|---|---|
|
Switching capacity |
256 Gbps non-blocking; 736 Gbps (stacked) |
|
Forwarding rate |
190.48 Mpps; 547.62 Mpps (stacked) |
|
Downlink ports |
48 × 10/100/1000 Mb RJ-45 UPOE (60 W/port) |
|
Uplink ports |
2 × 10 Gb / 25 Gb SFP+ fixed uplinks |
|
Stacking |
StackWise-480: 480 Gbps per switch; up to 8 members; < 50 ms fail-over |
|
Default PSU / PoE budget |
1100 W AC (platinum) / up to 445 W PoE |
|
DRAM / Flash |
8 GB / 16 GB |
|
Software license |
Network Advantage (–A) |
Key Features
256 Gbps Non-Blocking Fabric
Wire-speed forwarding across all 48 × 1 Gb ports and 10 / 25 Gb uplinks without oversubscription.
48 × 1 Gb UPOE Ports (60 W/port)
Powers Wi-Fi 6 APs, cameras, and other high-draw devices directly over Ethernet cables, reducing cabling complexity.
10 Gb and 25 Gb Uplink Ports
Provides high-speed uplink connectivity for aggregation, ensuring future-proof scalability.
64 MB Packet Buffer
Large buffer helps to smooth traffic spikes, reducing packet loss during high-bandwidth bursts.
StackWise-480 Scalability & Resiliency
Up to eight switches can be stacked, providing 736 Gbps total stack bandwidth with <50 ms failover.
Network Advantage Software License
Unlocks full Layer 3 routing, SD-Access segmentation, ETA for encrypted traffic analysis, and open APIs for automation.
Applications Scenarios
High-Density Access in Office
Powers IP phones, cameras, and access points across 48 ports, with 10 Gb uplinks to aggregation core. StackWise-480 provides reliable fail-over.
Campus Building Aggregation
Connects multiple classrooms and departments with PoE+ for phones, cameras, and APs; 40 Gb uplinks to core for seamless aggregation.
Data Center Top-of-Rack
Powers servers, switches, and storage devices with PoE+; 40 Gb uplinks stream uncompressed data to core for efficient, high-speed processing.
Product Comparison
|
Parameter |
C9300-48UB-A |
C9300-48UXM-A | |
|---|---|---|---|
|
Switching capacity |
256 Gbps (736 Gbps stacked) |
256 Gbps (736 Gbps stacked) |
580 Gbps (1.12 Tbps stacked) |
|
Forwarding rate |
190.48 Mpps (547.62 Mpps stacked) |
190.48 Mpps (547.62 Mpps stacked) |
428.57 Mpps (833 Mpps stacked) |
|
Downlink interfaces |
48 × 1 Gb UPOE (60 W) |
48 × 1 Gb PoE+ (30 W) |
36 × 2.5 Gb + 12 × 10 Gb UPOE (60 W) |
|
Uplink ports |
2 × 10 Gb / 25 Gb SFP+ fixed |
4 × 1 Gb SFP |
4 × 10 Gb / 1 Gb SFP+ |
|
Packet buffer size |
64 MB |
16 MB |
16 MB |
|
PoE budget |
445 W |
1440 W |
1440 W |
|
Software license |
Network Advantage (–A) |
Network Advantage (–A) |
Network Advantage (–A) |
C9300-48UB-A Switch Rear Panel
The switch rear panel includes StackWise connectors, StackPower or XPS connectors, ports, fan modules, and power supply modules.
Components Delivered in the Shipping Box
The shipping box contains the model of the switch you ordered and other components needed for installation. Some components are optional, depending on your order.
Specifications
| Cisco Catalyst 9300-48UB-A Detailed Specifications | |
|---|---|
| Model SKU | C9300-48UB-A |
| Software Image | Network Advantage (–A) |
| Switching Capacity | 256 Gbps (non-blocking) |
| Forwarding Rate | 190.48 Mpps (64-byte IPv4) |
| Stacking Bandwidth | 480 Gbps per switch; 736 Gbps end-to-end |
| Max Stack Members | 8 |
| Downlink Interfaces | 48 × RJ-45 10/100/1000 Mb PoE+ (IEEE 802.3at, 60 W/port) |
| Uplink Ports | 2 × QSFP+ 40 Gb (fixed) |
| Packet Buffer | 64 MB shared buffer |
| DRAM / Flash | 8 GB / 16 GB |
| IPv4 Routes (total) | 16,000 |
| IPv6 Routes (total) | 16,000 |
| QoS Entries | 5,120 |
| ACL Entries | 5,120 |
| VLAN IDs | 4,094 |
| MAC Address Table | 32,000 entries |
| External SSD | Optional USB 3.0 SSD slot (up to 240 GB) |
| Fans | 3 × field-replaceable, N+1 redundant |
| Default PSU | 1100 W AC (platinum) |
| Max PoE Budget | 445 W (with dual 1100 W PSUs) |
| Dimensions (H × W × D) | 1.73 × 17.5 × 19.2 in (4.4 × 44.5 × 48.8 cm) |
| Weight (with PSU) | 17.03 lb / 7.72 kg |
| Operating Temperature | –5 °C to +45 °C (sea level) |
| Security Features | Secure Boot, Trust Anchor SUDI, MACsec AES-256 |
| App Hosting | Container support (ThousandEyes, ASA-C) |
| SD-Access | Group-based policy, on-box automation, fabric segmentation |
Get More Information
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Quality Certifications
Customer Reviews
Questions & Answers
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How loud is the C9300-48UB-A when operating at full capacity?
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What diagnostic tools are available for troubleshooting the C9300-48UB-A?
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What are common hardware issues reported by users of the C9300-48UB-A?
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What warranty coverage does the C9300-48UB-A typically include?
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How energy-efficient is the C9300-48UB-A compared to similar devices?
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What steps should I take if the C9300-48UB-A experiences connectivity issues?
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What should I do if my C9300-48UB-A firmware update fails?
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What advanced security features does the C9300-48UB-A offer?
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Does the C9300-48UB-A support Power over Ethernet (PoE), and what standards does it comply with?
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How do I perform a software update on the C9300-48UB-A?
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Does the C9300-48UB-A require specific environmental conditions for optimal operation?
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Is there a recommended alternative if I can't find the C9300-48UB-A?
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Are there compatibility concerns I should be aware of when integrating the C9300-48UB-A into my existing network?
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Can I stack multiple units of the C9300-48UB-A together, and what's the limit?
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Can the C9300-48UB-A operate effectively in data center environments?
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How easy is it to configure the C9300-48UB-A for IPv6 usage?
Warranty
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Whoa. Delivery was fast.
High value order. Your team handled the insurance and tracking perfectly.
You believe in quality… and so do I. The shipment confirms it.
Solid throughput, but noisier fan than expected. Overall still great.
Great plug-and-play device. The management interface is intuitive.