Steps for enabling HiperSockets access to the intraensemble data network

OSA-Express® for zBX (OSX) connectivity enables HiperSockets connectivity to the intraensemble data network (IEDN). You configure an Internal Queued Direct I/O (IQD) channel path ID (CHPID) for HiperSockets with a channel parameter to enable the Internal Queued Direct I/O extensions (IQDX) function, referred to as the z/OS® Communications Server IEDN-enabled HiperSockets function.

Before you begin

  • To access the IEDN, the IBM® zEnterprise® 196 (z196) central processor complex (CPC) and the logical partition (LPAR) must be configured as members of an ensemble.

    For information about using the ENSEMBLE start option to specify that an LPAR is a member of an ensemble (ENSEMBLE=YES), see z/OS Communications Server: SNA Resource Definition Reference.

  • Configure all OSX interfaces to the IEDN.

    OSX connectivity to the IEDN is required to enable HiperSockets connectivity to the IEDN. For OSX configuration information, see Steps for configuring an interface for the intraensemble data network (CHPID type OSX).

  • Define a HiperSockets CHPID for the IQDX function using a channel parameter in the hardware configuration definition (HCD), and sufficient subchannel addresses to enable creation of one dynamic IQDX transport resource list element (TRLE) per OSX CHPID per IP version.

    You must define 10 IQDX subchannel addresses for each OSX CHPID that is in use for IPv4, and 10 subchannel addresses for each OSX CHPID that is in use for IPv6. Multiple VLAN does not affect the required number of subchannel addresses. For more information, see the information about defining IQD CHPIDs and device types in z/OS HCD Planning.

Procedure

Perform the following steps to enable HiperSockets access to the IEDN.

  1. Determine whether you want large outbound TCP protocol data to be transported to the IEDN over OSX interfaces or IQDX HiperSockets interfaces.
    For more information, see Performance considerations for the IEDN-enabled HiperSockets function.
  2. If necessary, configure the appropriate value for the AUTOIQDX parameter on the GLOBALCONFIG statement in the TCP/IP profile.
    • If you want all eligible traffic to be transported over IQDX HiperSockets interfaces, no other action is necessary. The AUTOIQDX parameter with the value ALLTRAFFIC is the default setting on the GLOBALCONFIG statement in the TCP/IP profile.
    • If you want large outbound TCP protocol data transmissions to be transported to the IEDN over OSX interfaces, specify the value NOLARGEDATA on the AUTOIQDX parameter of the GLOBALCONFIG statement in the TCP/IP profile.