Recommended HPE Ethernet Switches for RDMA-enabled Fabrics

2021-08-11
●Introduction
■The use of remote direct memory access (RDMA) in networks is becoming more common in the data center for low-latency connectivity. Customers have a choice of deploying either RDMA over Converged Ethernet (RoCE) or Internet wide area RDMA protocol (iWARP) RDMA protocols across the network.
■While all the adapters listed in the Products Affected table support both RoCE and iWARP, customers often ask which switches support RDMA. This is a valid question. To get the benefit of low-latency RDMA, enterprise-class switches are required in the network. This application note outlines the recommended Products AffectedHPE® ModelHPE Part NumberHPE Ethernet 10Gb 521T Adapter867707-B21HPE Ethernet 10Gb 524SFP+ AdapterP08446-B21HPE Ethernet 10/25Gb 621SFP28 Adapter867328-B21HPE Ethernet 10/25Gb 622FLR-SFP28 Adapter867334-B21HPE CN1200R-T 10GBase-T CNAQ0F26AHPE CN1300R 10/25GbE CNAQ0F09AHPE Synergy 4820C 10/20/25Gb CNA876449-B21HPE Synergy 6820C 25/50Gb CNAP02054-B21HPE Synergy 6810C 25/50Gb Ethernet Adapter867322-B21HPE Ethernet 10Gb 2-port Base-T QL41132HLRJ AdapterP08437-B21HPE Ethernet 10Gb 2-port BASE-T QL41132HQRJ OCP3 AdapterP10103-B21HPE Ethernet 10Gb 2-port SFP+ QL41132HLCU AdapterP21933-B21HPE Ethernet 10Gb 2-port SFP+ QL41132HQCU OCP3 AdapterP08452-B21HPE Ethernet 10GbE 4-port SFP+ QL41134HLCU AdapterP10094-B21HPE Ethernet 10/25Gb 2-port SFP28 QL41232HLCU AdapterP22702-B21HPE Ethernet 10/25Gb 2-port SFP28 QL41232HQCU OCP3 AdapterP10118-B21
TD-000130 Rev. 32enterprise-class switches from HPE that provide the best performance for an RDMA fabric running either 10-Gigabit Ethernet (GbE), 25GbE, or 50GbE bandwidths and either RoCE or iWARP RDMA protocols.
■RoCE needs a lossless network, which can require extra switch features, such as data center bridging (DCB) priority flow control (PFC)/enhanced transmission selection (ETS)/congestion notification (CN) to function properly over lossy Ethernet networks. The iWARP protocol does not need DCB and can function on most 10GBASE-T and 10G SFP+/25G SFP28/100G QSFP28 switches using just the TCP protocol stack.

MARVELL

867707-B21P08446-B21867328-B21867334-B21Q0F26AQ0F09A876449-B21P02054-B21867322-B21P08437-B21P10103-B21P21933-B21P08452-B21P10094-B21P22702-B21P10118-B213810MCX8320CX8325CX8360CX840057005710580058205920593059501190012900E59005940594559801950 12XGTSN8500CSN2010MSN2100MSN2410MSN2700MSN3700MSN3800M

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HPE Ethernet SwitchesCNAEthernet Adapter

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Application note & Design Guide

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December 4, 2020

Rev. 3

TD-000130

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