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Manage Multi-Speed Ethernet Lab Connectivity with Layer 1 Automation
Test labs supporting multiple network speeds often rely on manual cabling or separate switching platforms, adding complexity, cost, and setup time. Keysight Velocity HS and 4900 Series of fixed configuration automation switches simplify connectivity with per-port speed and media configuration. The HS Series supports Ethernet speeds up to 400 Gb/s, including rate conversion and aggregation. The 4900 Series provides transparent, non-blocking Layer 1 switching for dense 25G and 100G environments, with 72 QSFP28 ports on the 4902 and 288 SFP28 ports on the 4906. Both series help teams share equipment, automate connections, and scale lab capacity.
Multi-Speed GbE Flexibility
Match connectivity to your test environment with model-dependent speeds: 100 Mb/s through 25 Gb/s on the 4906, 100 Mb/s through 100 Gb/s on the 4902, and up to 400 Gb/s across the HS Series.
Multi-Media Support
Connect single-mode fiber, multimode fiber, direct attach cables, and active optical cables. Choose SFP28, QSFP28, or QSFP-DD interfaces across the portfolio, with per-port speed and media configuration to match lab equipment and test requirements.
Scalable Lab Connectivity
Scale the HS Series from 32 to 512+ ports using spine-and-leaf configurations. The 4900 Series supports architectures spanning thousands of ports, with up to 288 ports per chassis through 4902 breakouts or native 4906 SFP28 ports.
Automated Connections
Automate Layer 1 connection changes to reduce setup time and improve equipment sharing. Port tapping supports diagnostics and monitoring, while one-to-many traffic replication enables multiple tools to receive traffic from the same source.
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Interface speed modes
1, 10, 25, 40, 50, 100, 200, 400 GbE, 100 GbE, 100 Mb/s, 1 Gb/s, 2.5 Gb/s, 5 Gb/s, 10 Gb/s, 25 Gb/s
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Ports
32–512+ (spine-and-leaf) to 288
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Size
6RU
Popular Configurations
HS-3240 Automation Switch
High-speed Layer 1 automation switch with QSFP-DD interface supporting 1 to 400 GbE for test lab connectivity management.
High-speed Layer 1 automation switch with QSFP-DD interface supporting 1 to 400 GbE for test lab connectivity management.
HS-6400 Automation Switch
High-speed Layer 1 automation switch with QSFP-28 interface supporting 1 to 100 GbE for test lab connectivity management.
High-speed Layer 1 automation switch with QSFP-28 interface supporting 1 to 100 GbE for test lab connectivity management.
The resources below will help you determine the HS series switch you need for your application.
Data Sheet
Keysight Velocity HS Series
Solution Brief
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Services and support
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Frequently Asked Questions
Both models deliver the same multi-speed Layer 1 switching capabilities with Quad Small Form-factor Pluggable 28 (QSFP-28) and QSFP Double Density (QSFP-DD) interfaces at speeds from 1 to 400 GbE. They differ in chassis size and port density.
The HS series supports single-mode fiber, multimode fiber, direct attach copper (DAC), and active optical cable (AOC), all within a single chassis. Each port can be individually configured for speed and media type without affecting other connections.
Multiple HS series chassis can be linked in a spine-and-leaf configuration to scale from 32 to 512+ ports. Velocity Core or Velocity TestStream manages the expanded topology as a single logical fabric, giving engineers flexibility in port speeds, media types, and physical switch placement.
Yes. The HS series supports aggregation of multiple lower-speed ports to a single higher-speed port, enabling labs to use existing lower-speed test tools for higher-speed testing through rate conversion. This helps extend the useful life of existing test equipment as Ethernet speeds increase.
The HS series integrates with Velocity Core for centralized topology management, just-in-time provisioning, and secure remote access. It also works with third-party automation systems, giving teams the flexibility to incorporate the switches into existing lab infrastructure.