Summary of APPC link management

Table 9 summarizes the effect of CEMT commands on the status of an APPC link.

Table 9. Effect of CEMT commands on an operational APPC link
Commands issued in sequence shown below
1 1 1 SET MODENAME AVAILABLE(0)
1 1 1 SET MODENAME CLOSED
2 2 2 2 1 1 SET CONNECTION RELEASED
3 3 2 SET CONNECTION OUTSERVICE
Resulting states and reactions
N N N N N N N N ALLOCATE requests suspended
Y Y N N N N Y N Partner can renegotiate
Y Y Y Y Y Y Y Y ALLOCATE rejected with SYSIDERR
N Y Y N Y Y Y Y SNASVCMG sessions released
-- Y N -- Y N Y N Partner can rebind SNASVCMG

Command scope and restrictions

User modesets, which are built from CEDA DEFINE SESSIONS definitions, may be modified by using the SET MODENAME command or by overtyping the INQUIRE MODENAME display data. The SNASVCMG modeset, on the other hand, is built from the CONNECTION definition and any attempts to modify its status with a SET or INQUIRE MODENAME command is suppressed. It is, however, controlled by the SET|INQ CONNECTION, which also affects the user modesets.

CEMT INQUIRE NETNAME, where the netname is the applid of the partner system, displays the status of all sessions associated with that link. Any attempt to alter the status of these sessions is suppressed. You must use SET|INQ CONNECTION|MODENAME to manage the status of user sessions and to control negotiation with remote systems. INQ NETNAME may also be useful in error diagnosis.

Related concepts
General information about managing APPC links
Related tasks
Defining APPC links
Acquiring a connection
Controlling sessions with the SET MODENAME commands
Releasing the connection
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