• Cisco N3K-C3548P-XL 48-port 10G SFP+ switch with 4x40G QSFP+ uplinks
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Cisco

Cisco N3K-C3548P-XL | Nexus 3500 48-Port 10G SFP+ Switch, Layer 3, Ultra-Low Latency

N3K-C3548P-XL

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Description

The Cisco Nexus 3548-XL is a high-performance 1RU data centre switch designed for ultra-low latency applications including high-frequency trading, HPC, and top-of-rack deployments. Featuring 48 fixed 10G SFP+ ports with enhanced CPU, memory, and NX-OS capabilities, it delivers wire-rate Layer 2 and 3 switching with latency as low as 190 nanoseconds. Ideal for mission-critical environments demanding exceptional performance and reliability.

Features

Cisco Algo Boost technology for sub-200ns latency
- Full Layer 3 routing: BGP, OSPF, EIGRP, RIP
- Multicast protocols: PIM-SM, PIM-SSM, MSDP
- VXLAN support for network virtualisation
- Comprehensive QoS with 8 queues per port
- Latency monitoring and active buffer monitoring
- Hardware-based timestamping for precision timing
- 1-PPS timing port for synchronisation
- VDC (Virtual Device Contexts) support
- VLAN support up to 4094 VLANs
- Spanning Tree: STP, RSTP, MSTP
- Link aggregation: 802.3ad LACP (32 groups, 16 ports per group)
- ACL support (port, VLAN, routed)
- SPAN and Ethanalyzer troubleshooting tools
- Hot-swappable redundant power and fans
- Bidirectional airflow support (port-side exhaust or intake)
- Cisco NX-OS programmability with Python, REST APIs
- Management via CLI, DCNM, SNMP, NETCONF

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

48x 10G SFP+ ports (supports 1G and 10G)
- Switching capacity: 1.44 Tbps
- Forwarding rate: 1,070 Mpps
- Ultra-low latency: 190 nanoseconds port-to-port
- CPU: Dual-core 2.5 GHz x86
- System memory: 16 GB
- Bootflash memory: 16 GB
- Packet buffer: 9 MB shared buffer
- 40G support via four sequential SFP+ ports combined
- Layer 2 and Layer 3 switching
- Dual redundant hot-swappable power supplies
- Four individual hot-swappable fans
- Power consumption: 400W typical, 220W efficient mode
- Form factor: 1RU rack-mountable
- Operating system: Cisco NX-OS with DME support
- Airflow: Front-to-back (port-side exhaust)

FAQs

Q: Does this switch support Power over Ethernet (PoE)?
A: No, the N3K-C3548P-XL does not support PoE. The 'P' designation refers to port-side exhaust airflow, not PoE capability. All 48 ports are SFP+ fibre ports for 1G or 10G connectivity.

Q: What is the latency performance of this switch?
A: The Nexus 3548-XL achieves exceptional ultra-low latency of 190 nanoseconds port-to-port with Cisco Algo Boost technology, making it ideal for high-frequency trading and latency-sensitive applications.

Q: How does this switch support 40G connectivity?
A: The switch supports 40 Gigabit Ethernet by combining four sequential SFP+ interfaces into a logical 40G port, rather than through dedicated QSFP+ uplink ports. This provides flexible uplink options for data centre aggregation.

Q: What are the enhanced specifications compared to the standard 3548-X?
A: The 3548-XL features a faster 2.5 GHz CPU (vs 1.2 GHz), 16 GB system memory (vs 4 GB), and 16 GB bootflash (vs 2 GB), enabling support for the Cisco NX-OS Data Management Engine (DME) model and enhanced scalability.

Q: What deployment scenarios is this switch best suited for?
A: This switch excels in high-frequency trading environments, high-performance computing clusters, data centre top-of-rack deployments, and any scenario requiring ultra-low latency Layer 2/3 switching with high-density 10G connectivity.

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