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Cisco Nexus 3550-F Fusion HPT Data Sheet

Data Sheet

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Updated:July 9, 2020

Available Languages

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  • PDF
    (366.1 KB)
    View with Adobe Reader on a variety of devices
Updated:July 9, 2020


High-precision timestamping

The Cisco Nexus® 3550-F Fusion HPT is a high-precision network tapping, aggregation, and monitoring solution, optimized for high-performance, low-latency networks.

The device incorporates our world-leading HPT1 time-stamping technology, for industry-leading 100ps (0.1ns) timestamps that are embedded in every packet. This makes the Cisco Nexus 3550-F Fusion HPT the highest-precision network aggregation and monitoring solution available on the market. The device also offers high-quality time synchronization to pulse-per-second (PPS), GPS, and Precision Time Protocol (PTP) sources, ensuring that every packet is globally synchronized as well as precisely timestamped.

High-bandwidth ingress and egress

The system offers 400Gb/s of ingress and configurable egress options of up to 80Gb/s.

This ensures that tap aggregation continues to perform well even under adverse network conditions. The device supports up to 40 ingress ports operating at 1Gb/s2, 10Gb/s, or 40Gb/s2 (400Gb/s total), with HPT timestamps at 100ps resolution. Egress is supported through between 1 and 8 ports operating at 10Gb/s each, or 1 to 2 ports operating at 40Gb/s2 each. Egress ports also feature industry-standard Ethernet flow control, to allow lossless transmission even when capture devices are congested.

Deep packet buffer hierarchy

A deep, multilayered packet buffer architecture provides robust micro-burst protection.

Correlated micro-bursts are a fact of life, especially in high-performance networks. Yet regulatory environments require that every packet be captured. The Cisco Nexus 3550-F Fusion HPT has a deep packet buffer hierarchy to ensure that packets are captured, time stamped, and transferred to long-term storage, even under extreme correlated micro-burst scenarios. It offers 32kB per-port buffers, 64kB per-quad-port buffers, and 32GB of global packet buffering (see figure overleaf). This multilayer architecture makes the Cisco Nexus 3550-F Fusion HPT the most reliable tap aggregation system available.

Transparent tapping

Replace 20 optical taps with a single 1RU device

Optical taps are difficult to deploy and manage, and consume large amounts of rack space. Every ingress port on the Cisco Nexus 3550-F Fusion HPT can be configured as a Layer 1 tap, allowing the device to replace 20 optical taps in a single 1RU of rack space. Cisco Nexus 3550-F HPT taps are transparent to other devices. They add less than 5ns of delay to the tapped path, and nearly undetectable jitter.

Ease of use and manageability

Ease of use and enterprise manageability features are core to the Cisco Nexus 3550-F Fusion range.

Many users rate our CLI as one of the best they have operated. Every command available on the CLI is also available via a remote JSON RPC API. This makes the device easy to operate and to manage at scale. All Cisco Nexus 3550-F devices include standard enterprise manageability and deployability features, including automatic configuration (via DHCP), SNMP, TACACS+ authentication, onboard Python programmability, BASH shell access, and time-series logging.

Cisco Nexus 3550-F Fusion HPT

Figure 1.               

Cisco Nexus 3550-F Fusion HPT

Cisco Nexus 3550-F Fusion HPT multilayer, deep packet buffer hierarchy

Figure 2.               

Cisco Nexus 3550-F Fusion HPT multilayer, deep packet buffer hierarchy


     400Gb/s ingress (1GbE2/ 10GbE / 40GbE2)

     100ps high-precision timestamping (HPT1)

     80Gb/s egress (8x 10GE or 2x 402GbE) with Ethernet flow control (IEEE 802.3x)

Packet buffering

     32kB per port buffer (40x)

     64kB per quad port buffer (10x)

     32GB deep buffer (shared)

Time synchronization

     72 channel GPS, GLONASS, QZSS, BeiDou

     Active antenna support (3.3V)

     Cold-start timesync acquisition <30s

     PPS in/out with selectable 50Ω termination

     PTP/NTP support via management port


     3x 16 SFP+ line cards, up to 48 ports

     3x 4QSFP line cards, up to 12 ports

     Any 40 ports assignable as ingress

     Any 8 ports assignable as egress

     SFP+ Fiber (10GBASE-SR, 10GBASE-LR, 10GBASE-LRM, 1000BASE-SX, 1000BASE-LX)

     SFP+ Copper Direct Attach

     SMA for PPS in/out

     SMA for GPS in

     RJ45 management port

     RJ45 industry-standard serial port

     USB (for firmware upgrades)

1Patent pending
2Scheduled for a future firmware release


     CLI via serial, SSH, and telnet

     JSON RPC API for all CLI commands

     Automatic configuration via DHCP

     TACACS+ and multiuser support

     ACLs on management interface

     Firmware updates via SFTP, TFTP, HTTP, and USB

     Onboard BASH and Python scripts

     Onboard Cron jobs


     Packet counters (RX, TX, dropped, etc.)

     Per port status LEDs

     Live packet dump

     SFP diagnostics (light levels, temps, etc.)

     SNMP, local, and remote syslog

     Time-series logging to InfluxDB


     19” 1RU, rack mount

     Weight: 11kg (24lbs)

     Dual, hot-swappable supplies

     Standard: AC 90-264V, 47-64 Hz, included IEC C13-C14 cables

     Optional: DC 40-72V

     Maximum consumption: 150W

     Dual hot-swappable fan modules

     Optional airflow direction (FTB, BTF)

Cisco environmental sustainability

Information about Cisco’s environmental sustainability policies and initiatives for our products, solutions, operations, and extended operations or supply chain is provided in the “Environment Sustainability” section of Cisco’s Corporate Social Responsibility (CSR) Report.

Reference links to information about key environmental sustainability topics (mentioned in the “Environment Sustainability” section of the CSR Report) are provided in the following table:

Sustainability topic


Information on product material content laws and regulations


Information on electronic waste laws and regulations, including products, batteries, and packaging

WEEE compliance

Cisco makes the packaging data available for informational purposes only. It may not reflect the most current legal developments, and Cisco does not represent, warrant, or guarantee that it is complete, accurate, or up to date. This information is subject to change without notice.

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