What is the maximum switching capacity of HPE JH398A?

The HPE JH398A FlexFabric 5940 4-slot chassis delivers up to 2560 Gbps switching capacity and 1904 Mpps throughput when fully loaded with modules. This non-blocking architecture supports wire-speed 40GbE/10GBASE-T across all ports, ideal for high-density data center traffic.

What expansion options does the JH398A support?

It features 4 expansion slots for modules enabling up to 32 QSFP+ 40GbE ports, 96 1/10GBASE-T, 96 SFP+, or converged ports. Power supplies (min 2) and fan trays are ordered separately to match airflow requirements.

What latency performance does this switch provide?

<1 µs latency at 10 Gbps for 64-byte packets ensures ultra-low delay in ToR deployments. Combined with 1904 Mpps forwarding, it excels in latency-sensitive applications like HPC and NVMe-oF storage.

Which routing protocols are supported on JH398A?

Supports OSPF, RIP, BGP-4, IS-IS, VRRP, MPLS, IGMP, BFD, IPv6 variants (OSPFv3, RIPng, BGP-4+). Handles 128K IPv4/64K IPv6 routes and 288K MAC entries for advanced L3 networking.

Is the JH398A suitable for IRF stacking?

Yes, supports IRF stacking up to 9 switches, simplifying management as a single logical unit. Enhances redundancy and scalability in leaf-spine architectures without compromising performance.

What form factor and power features does it have?

2U rack-mountable chassis (17.3x26x3.5in, 59.52 lbs) with 4 hot-plug power slots (AC 120/230V, up to 888W operational). Redundancy via N+1 supplies; fans match power airflow direction.

JH398A - HPE 5940 4-slot Switch Switch

Name: JH398A - HPE 5940 4-slot Switch Switch
Brand: HPE
SKU: JH398A
Price: 902 USD
Availability: InStock

JH398A - HPE 5940 4-slot Switch Switch | US IT Hardware

Product overview

The HPE FlexFabric 5940 4-slot Switch (JH398A) is a high-performance, low-latency modular chassis designed for data center top-of-rack deployments. This L3 managed switch supports up to 2560 Gbps switching capacity and 1904 Mpps forwarding rate when fully populated with modules, achieving <1 µs latency for 10 Gbps traffic. It features 4 expansion slots accommodating up to 32 QSFP+ 40GbE ports, 96 1/10GBASE-T, SFP+, or converged ports. Rack-mountable in 2U, it includes redundant hot-plug power supplies (up to 4, ordered separately) and fan trays. Advanced routing protocols like OSPF, BGP-4, IS-IS, MPLS, and VRRP ensure robust Layer 3 functionality. With 288K MAC addresses, 128K IPv4/64K IPv6 routes, it handles dense east-west traffic in cloud, HPC, and enterprise environments. Jumbo frames, IEEE standards compliance (802.3ae, 802.1Qaz), and IRF stacking up to 9 units provide scalability and reliability for mission-critical networks.

2560 Gbps switching capacity when fully loaded.
1904 Mpps forwarding rate with <1 µs latency.
4 expansion slots for 32x40GbE or 96x10G ports.
288K MAC addresses and 128K IPv4 routes.
Hot-plug redundant power and fans supported.
IRF stacking up to 9 units for scalability.

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Routing Protocols
Manufacturer part #	JH398A
Brand	HPE
Condition	Refurbished
Model	5940 4-slot Switch
Standards	IEEE 802.3ae, 802.1Qaz, 802.3ad
IPv4 Routes	128K entries
IPv6 Routes	64K entries
Jumbo Frames	Yes
Product Line	FlexFabric 5940
Product Type	L3 Modular Switch
MAC Address Table	288K entries

Compatible systems

Native compatibility within HPE FlexFabric 5940 ecosystem; modules, PSUs, fans sold separately.

HPE FlexFabric 5940
Model: Any
Form factor: 2U Rack
Generation: All
Chassis integrates with 5940 modules like JH394A (48x10GBASE-T+6x40G).

Best for

Data Center Top-of-Rack
Deploys as modular ToR switch handling high-density 10/40GbE server connectivity with low-latency east-west traffic.
Cloud Networking
Scales spine/leaf fabrics via IRF stacking, supporting 2560Gbps throughput for virtualized workloads.
HPC Environments
Provides <1µs latency and 1904 Mpps for compute clusters requiring ultra-fast packet forwarding.
Enterprise Aggregation
Consolidates access switches with L3 routing, MPLS, and 288K MAC table for campus core.
Storage Fabrics
Supports converged ports for FCoE/iSCSI, enabling unified networking in SAN environments.
Service Provider Edge
Handles BGP/OSPF routing with 128K IPv4 routes for peering and high-availability deployments.

Details

Shipping, warranty & returns

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Latency	<1 µs (10 Gbps)
Throughput	1904 Mpps
Switching Capacity	2560 Gbps

Power Supplies	4x hot-plug (not incl.)
Power Redundancy	Yes, N+1
Power Consumption	888W operational

Weight	59.52 lbs
Form Factor	2U / 17.3 x 26 x 3.5 in
Enclosure Type	Rack-mountable 2U

Max Ports	32x40GbE or 96x10G
USB Ports	1x USB 2.0, 1x mini-USB
Expansion Slots	4 x Expansion Slots
Management Interface	RJ-45 LAN, Console

HPE 5940 4-slot Switch Switch

Product overview

Featuring

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Network & Communication

Power Consumption

Physical Characteristics

Interface/Ports

Frequently asked questions