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IBM z13s Technical Guide
D.3.11 SMC-D support overview
SMC-D requires IBM z13 and IBM z13s servers to be at driver level 27 or later for support of
ISM.
SMC-D requires the following software:
z/OS V2R2 with PTFs (See Table D-2 on page 499) or later is the only supported
operating systems for the SMC-D protocol:
– HCD APAR (OA46010) is required.
– You cannot roll back to previous z/OS releases.
z/OS guests under z/VM 6.3 are supported to use SMC-D.
IBM is working with its Linux distribution partners to include support in future Linux on
z Systems distribution releases.
Other ISM considerations
ISM systems have the following limits:
32 ISM VCHIDs (in IOCDS / HCD) per CPC. Each IOCDS / HCD VCHID represents a
unique internal shared memory network each with a unique Physical Network ID.
255 VFs per VCHID (8k VFs per CPC). For example, the maximum number of virtual
servers that can communicate over the same ISM VCHID is 255.
Each ISM VCHID in IOCDS / HCD represents a unique (isolated) internal network, each
having a unique Physical Network ID (PNet IDs are configured in HCD/IOCDS).
ISM VCHIDs support VLANs (can be subdivided into VLANs).
ISM provides a GID (internally generated) to correspond with each ISM FID.
MACs (VMACs), MTU, physical ports, and Frame size are all N/A.
ISM is supported by z/VM (for pass-through guest access to support the new PCI
function).
Additional documentation
A configuration example for SMC-D is presented in the Redbook
IBM z/OS V2R2
Communications Server TCP/IP Implementation - Volume 1, SG24-8360.
IOCP required level for z13s: The required level of IOCP for the z13s server is V5 R2 L1
or later with PTFs. Defining ISM devices on machines other the z13 or z13s servers will not
be possible. For more information, see the following manuals:
z Systems Stand-Alone Input/Output Configuration Program User's Guide, SB10-7166.
z Systems Input/Output Configuration Program User's Guide for ICP IOCP, SB10-7163.
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