
Chapter 11. SNA over Ethernet 171
The SAPADDR specified on the PORT statement is the access point where VTAM will listen.
Thus, if we specified a SAPADDR of 8 on the PORT statement on system xeon, then xeon
would begin to listen for packets on access point 8.
A PORT statement also specifies an MVS device number on the CUADDR operand; that
device number, in turn, is connected to a specific NIC by a FLEX-ES emulated control unit
definition. The PORT CUADDR specification thus determines the MACADDR on which
VTAM listens.
While the PORT statement defines the addresses of the activating system, the PU statements
define the addresses of other hosts ...