Communications Server provides internal links between TCP/IP stacks that are running within the same MVS™ image. This support is referred to as a Same Host (IUTSAMEH) link. If DYNAMICXCF is defined, TCP/IP always creates and activates a same host (IUTSAMEH) device and link (unless a static IUTSAMEH device is already defined) even if this is the only stack on the MVS image. When TCP/IP activates the IUTSAMEH device, VTAM® dynamically builds the IUTSAMEH TRLE. The generated device name is IUTSAMEH, the generated link name is EZASAMEMVS (IPv4), and the generated interface name is EZ6SAMEMVS (IPv6). As other stacks are brought up within the same MVS image, a host route is created to each of these stacks across the same host link. It is recommended that users do not configure a static device for IUTSAMEH (allow TCP/IP to dynamically create the device and link). Communications Server also uses the IUTSAMEH link for Enterprise Extender support.
The IUTSAMEH device and link (IPv4) or interface (IPv6) do not become active and remain in SENT SETUP status until either another TCP/IP stack or Enterprise Extender connection is activated on this MVS image.
DEVNAME: IUTSAMEH DEVTYPE: MPCPTP
DEVSTATUS: SENT SETUP
LNKNAME: EZASAMEMVS LNKTYPE: MPCPTP LNKSTATUS: NOT ACTIVE
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INTFNAME: EZ6SAMEMVS INTFTYPE: MPCPTP6 INTFSTATUS: NOT ACTIVEIn the case where IUTSAMEH is active solely because of Enterprise Extender and the IUTSAMEH is subsequently stopped, to restart the IUTSAMEH for Enterprise Extender, the XCA major node must be recycled. Otherwise, it might require manual reactivation of the Enterprise Extender LINEs and PUs, and manual redials.