IBM z13s, Technical Manual

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Chapter 7. Software support
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7.3.25 HiperSockets Multiple Write Facility
The HiperSockets Multiple Write Facility allows the streaming of bulk data over a
HiperSockets link between two LPARs. Multiple output buffers are supported on a single
Signal Adapter (SIGA) write instruction. The key advantage of this enhancement is that it
allows the receiving LPAR to process a much larger amount of data per I/O interrupt. This
process is transparent to the operating system in the receiving partition. HiperSockets
Multiple Write Facility with fewer I/O interrupts is designed to reduce processor utilization of
the sending and receiving partitions.
Support for this function is required by the sending operating system. For more information,
see 4.8.6, “HiperSockets” on page 172. Table 7-26 lists the minimum support requirements
for HiperSockets Virtual Multiple Write Facility.
Table 7-26 Minimum support requirements for HiperSockets multiple write
7.3.26 HiperSockets IPv6
IPv6 is expected to be a key element in future networking. The IPv6 support for HiperSockets
allows compatible implementations between external networks and internal HiperSockets
networks.
Table 7-27 lists the minimum support requirements for HiperSockets IPv6 (CHPID type IQD).
Table 7-27 Minimum support requirements for HiperSockets IPv6 (CHPID type IQD)
7.3.27 HiperSockets Layer 2 support
For flexible and efficient data transfer for IP and non-IP workloads, the HiperSockets internal
networks on z13s can support two transport modes. These modes are Layer 2 (Link Layer)
and the current Layer 3 (Network or IP Layer). Traffic can be Internet Protocol (IP) Version 4
or Version 6 (IPv4, IPv6) or non-IP (AppleTalk, DECnet, IPX, NetBIOS, or SNA).
HiperSockets devices are protocol-independent and Layer 3-independent. Each
HiperSockets device has its own Layer 2 Media Access Control (MAC) address. This MAC
address allows the use of applications that depend on the existence of Layer 2 addresses,
such as Dynamic Host Configuration Protocol (DHCP) servers and firewalls.
Layer 2 support can help facilitate server consolidation. Complexity can be reduced, network
configuration is simplified and intuitive, and LAN administrators can configure and maintain
the mainframe environment the same way as they do a non-mainframe environment.
Operating system Support requirements
z/OS z/OS V1R12
Operating system Support requirements
z/OS z/OS V1R12
z/VM z/VM V6R2
z/VSE z/VSE V5R1
Linux on z Systems SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 11
Red Hat RHEL 7
Red Hat RHEL 6