The N3K-C3548P-XL is a high-density, ultra-low latency 1U rack-mountable switch from the Cisco Nexus 3500 Series, purpose-built for performance-critical data center deployments. As an "XL" (Extended Memory) variant, it features an upgraded 2.5 GHz CPU, 16 GB DRAM, and 16 GB bootflash, enabling robust support for large routing tables, advanced telemetry, and the Cisco NX-OS Data Management Engine (DME). This switch is optimized for Top-of-Rack (ToR) leaf-spine architectures, high-frequency trading (HFT), and cloud environments requiring sub-microsecond latency and 48-port 10G density.
Ultra-Low Latency & High-Density Performance
48 x 10G SFP+ line-rate ports + 4 x 40G QSFP+ uplink ports (breakout to 4x10G supported).
Non-blocking 960 Gbps switching capacity and 720 Mpps forwarding rate.
Cut-through switching with latency as low as 250 nanoseconds.
Supports jumbo frames up to 9216 bytes.
Extended Hardware (XL Edition)
2.5 GHz CPU, 16 GB RAM, 16 GB bootflash for scalable L2/L3 features.
12 MB shared packet buffer with dynamic allocation for traffic microbursts.
Front-to-Back (Port-side Exhaust) airflow for standard hot/cold aisle containment.
Carrier-Grade Reliability
Dual redundant, hot-swappable 400W AC power supplies.
4x hot-swappable, N+1 redundant fans.
Operating temperature: 0°C to 40°C.
Advanced Data Center Features
Precision Time Protocol (PTP/IEEE 1588v2) and 1-PPS timing port for clock sync.
Comprehensive protocol support: VXLAN, EVPN, BGP, OSPF, ACLs, QoS, vPC.
Robust security: MACsec-256, FIPS 140-3, RBAC, TACACS+.
Management: CLI, GUI, DCNM, REST API, POAP, SSH.
| Parameter | Details |
|---|---|
| Part Number | N3K-C3548P-XL |
| Form Factor | 1U Rack-mountable |
| Ethernet Ports | 48 x 1/10G SFP+; 4 x 40G QSFP+ |
| Switching Capacity | 960 Gbps (non-blocking) |
| Forwarding Rate | 720 Mpps |
| Latency | < 1.3 μs (cut-through) |
| CPU/Memory | 2.5 GHz; 16 GB DRAM; 16 GB Bootflash |
| Buffer | 12 MB shared |
| Airflow | Front-to-Back (Port-side Exhaust) |
| Power | Dual 400W AC, Hot-swappable |
| Power Consumption | 152W typical; 265W max |
| Management | 1x 1G RJ45, 1x Console, 2x USB, 1x 1-PPS |
| OS | Cisco NX-OS |
| Dimensions (WxDxH) | 439 x 467 x 43.6 mm |
| Weight | 7.9 kg |
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