InfiniBand, iWARP, and RoCE
Manoj Wadekar, Fellow, Chief Technologist QLogic Corporation
This chapter describes the InfiniBand (IB) industry standard and network architecture. IB features such as zero-copy and remote direct memory access (RDMA) help reduce processor overhead by directly transferring data from sender memory to receiver memory without involving host processors. This chapter covers overall IB architecture and its various layers, with an emphasis on link and network layers, Channel Adapters, switches, and routers. Concepts discussed include IPv6 and Ethernet datagrams, packet formats, speed and width negotiations, buffering, flow control, and Q-pairs. Emerging protocols for providing RDMA functions to other applications ...
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