z/OS V2R4 Communications Server is enhanced to support OSA-Express7S features with 25 GbE bandwidth and IBM 25 GbE RoCE Express2 features.
Improved scalability with z/OS V2R2 Communications Server
z/OS V2R2 provides improved scalabilty by enabling the TCP/IP stack and its strategic device drivers to utilize 64-bit storage. V2R2 also provides improved scalabilty for Enterprise Extender and the Internet Key Exchange daemon (IKED), and raises the limit for the number of application-instance dynamic virtual IP addresses (DVIPAs) for a single TCP/IP stack from 1024 to 4096. Read more about the features in z/OS V2R2 Communications Server in the linked blog entry below.
In z/OS V2R3, Communications Server provides encryption-readiness technology for z/OS administrators to determine which TCP and Enterprise Extender traffic patterns to and from their z/OS systems meet approved encryption criteria and which do not. In December 2018, IBM zERT Network Analyzer, a new web-based interface, is made available to help you determine which z/OS TCP and Enterprise Extender traffic is or isn’t protected according to specific query criteria.
IBM Configuration Assistant for z/OS Communications Server
The Configuration Assistant for z/OS Communications Server, an optional GUI-based tool, provides a guided interface to help you create and manage TCP/IP profiles, and simplify configuration of TCP/IP policy-based networking functions.
Network Mgmt. for IBM Cloud Provisioning and Mgmt. for z/OS
IBM Configuration Assistant for z/OS Communications Server plays a key role for the network administrator as part of the IBM Cloud Provisioning and Management for z/OS solution.
Shared Memory Communications - Direct Memory Access (SMC-D)
IBM z/OS V2R3 offers new support for fast low-latency TCP/IP traffic between LPARs within a CPC using the Shared Memory Communications – Direct Memory Access (SMC-D) software protocol over firmware-provided Internal Shared Memory (ISM) devices. SMC-D is expected to offer substantial performance, throughput, response time and CPU consumption benefits versus standard TCP/IP communications over HiperSockets™. This support is available on z/OS V2R2 via APARs OA48411 and PI45028.
Software requirements and specifications can be found in the following link.