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)1. SMCv1 connectivity is limited to hosts that are directly attached to a common single IP subnet.
- Introduce and provide the specifications of the next version of SMC, referred to as SMC Version 2 (SMCv2). SMCv2 provides Shared Memory Communications capability over multiple IP subnets.
- Introduce and provide the specifications of the first version and release of SMCv2 defined as SMCv2.1. The purpose of SMC version releases is to allow the introduction of minor SMC feature updates to an existing SMC version that require protocol changes without disrupting compatibility.
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:
01 February 2024
UID
ibm17112343