The implementation of EE in z/OS involves data transfer between the VTAM and the TCP/IP address spaces. A special connection type called IUTSAMEH is used to move data from VTAM to TCP/IP and vice versa.
Define EE link in VTAM need to add info in 4 places
- TCPIP profile
- ATCSTRxx
- VTAM switch major mode
- VTAM XCA major node
TCPIP profile
IPCONFIG SOURCEVIPA - makes TCPIP to add source VIPA to all outbound datagram. Source VIPA is required for EE support
A series of DEVICE, LINK and START statements is required to define a multipath channel point-to-point device (MPCPTP) for VTAM-to-TCP/IP communication.
DEVICE must use IUTSAMEH which is a reserverd TRLE (Transport Resource List Entry) for the EE connection on host
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