White Papers
Abstract
This paper is provided for IBM®, IBM customers, and vendors who have an interest in the IBM Shared Memory Communications (SMC) protocol and related solutions such as IBM z/OS® Shared Memory Communications, IBM Z® Internal Shared Memory, and IBM RoCE Express® features.
Content
The purpose of this paper is to:
- Provide a brief high-level review of SMC in its original form. In this paper, SMC in its original form is referred to as SMC Version 1 (SMCv1). SMCv1 connectivity is limited to hosts that are directly attached to a common single IP subnet.
- Introduce the next version of SMC, referred to as SMC Version 2 (SMCv2). SMCv2 provides Shared Memory Communications capability over multiple IP subnets.
The Third Edition of the IBM SMCv2 Overview adds the SMC Version 2.1 feature updates for SMC-Rv2 with RoCEv2 specifications.
Note:
IBM Shared Memory Communications: Version 2 (Fourth Edition) was published in January 2024. The Fourth Edition of the IBM SMCv2 Overview adds the SMC Version 2.1 feature updates for SMC-Dv2 with Emulated-ISM specifications.
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Document Information
Modified date:
28 January 2024
UID
ibm17009315