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Lenovo ThinkSystem NE2572

CurrentNetwork1U rack
Lenovo ThinkSystem NE25721U rack48 ports3.6 Tbps

The ThinkSystem NE2572 RackSwitch is Lenovo's primary 1U 25GbE top-of-rack data center switch, designed for modern server clusters, hyperconverged systems, and NVMe-over-Fabrics storage arrays. Equipped with forty-eight 25GbE SFP28 access ports and six 100GbE QSFP28 uplink ports, it delivers 3.6 Tbps of line-rate Layer 2/Layer 3 switching with cut-through latency below 500 nanoseconds. It runs Lenovo Cloud Network OS (CNOS) with native telemetry, REST APIs, and VXLAN EVPN encapsulation. Secondary market buyers must confirm airflow direction on fans and power supplies, verify optical port functionality, and check CNOS image status.

Also written as: ThinkSystem NE2572, NE2572 RackSwitch, Lenovo NE2572 25GbE Switch

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Specifications

BrandLenovo
FamilyThinkSystem NE
Form factor1U rack
ReleasedJun 2017
Ports48x 25GbE SFP28 ports + 6x 100GbE QSFP28 uplink ports
Switching capacity3.6 Tbps aggregate full duplex switching throughput
Power supplyDual redundant hot-swap AC power supplies (front-to-rear or rear-to-front airflow)

Generations

Reference prices (last 12 months, updated 2026-10-27)

Used: USD 2,850 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
ebay.comusedUSD 2,850Tested 48x 25GbE + 6x 100GbE switch with dual AC power supplies and CNOS firmware2026-10-27

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Compatible parts

Network adapters

Transceivers

Works together

How the Lenovo ThinkSystem NE2572 connects to servers, storage and the network: 3 ways, with the parts and products on each path.

iSCSI and NVMe/TCP over EthernetFile storage (NFS and SMB)Hyperconverged cluster

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Servers

Adapters for the server

Storage

Optics

iSCSI and NVMe/TCP over Ethernet: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Servers

Adapters for the server

Storage

Optics

File storage (NFS and SMB): how it fits together

Hyperconverged cluster

Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.

HCI nodes

Adapters for the server

Optics

Hyperconverged cluster: how it fits together

Plan and size it

Check compatibility with Lenovo

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Lenovo has tested with the Lenovo ThinkSystem NE2572.

Equivalent models from other brands

Buying a used NE2572: what to check

Confirm all 48 SFP28 and 6 QSFP28 ports link properly; verify matching airflow part numbers across all fan modules and power supplies; reset admin credentials via console port.

FAQ

Can the 100GbE QSFP28 ports break out into 25GbE ports?

Yes, each 100GbE QSFP28 port can be configured to break out into four 25GbE or four 10GbE links using appropriate splitter cables.

Does the NE2572 support RoCE storage fabrics?

Yes, the NE2572 supports Priority Flow Control (PFC) and Explicit Congestion Notification (ECN) required for lossless RDMA over Converged Ethernet (RoCE v2).

Buying or selling NE2572?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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Sources