480 IBM z13s Technical Guide
Table D-1 shows the differences in the number of ports and shared support for different
systems.
Table D-1 RoCE number of enabled ports and shared/dedicated environment
The 10GbE RoCE Express feature shown in Figure D-4 is used exclusively in the PCIe I/O
drawer. Each feature has one PCIe adapter and two ports. A maximum of 16 features can be
installed. The 10GbE RoCE Express feature uses a short reach (SR) laser as the optical
transceiver and supports the use of a multimode fiber optic cable terminated with an LC
Duplex connector. Both point-to-point connection (with another 10GbE RoCE Express
adapter) and switched connection with an enterprise-class 10 GbE switch are supported.
Figure D-4 10GbE RoCE Express
Although SMC-R can be used with direct RoCE Express to RoCE Express connectivity
(without any switch), this type of direct physical connectivity forms a single physical
point-to-point connection, disallowing any other connectivity with other LPARs (for example,
any other SMC-R peers). Although this is a viable option for test scenarios, it is not practical
(nor recommended) for production deployment.
System Name z/OS Supported
Ports
Shared mode Dedicated mode
z13 2 YES No
z13s 2 YES No
zEC12 1 NO YES
zBC12 1 NO YES
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