APPC Subsystem on MPE/XL Node Manager's Guide (30294-90007)

Chapter 5 127

Managing the APPC Subsystem

Shutting Down the APPC Subsystem

You shut down the APPC subsystem by issuing the APPCCONTROL STOP

command. Whenever the APPC subsystem shuts down, performance

statistics are logged for all sessions that were active at the time of the

shutdown (if logging is conﬁgured and statistics gathering is enabled).

The APPCCONTROL STOP command shuts down the APPC subsystem by

deactivating all APPC sessions. There are three shutdown types you

can use: KILL, PROTOCOL, and QUIESCE. See the description of

APPCCONTROL STOP in Chapter 2 , “Interactive Control Operator

Commands,” for a description of shutdown types.

The following is an example of logging messages you should see for

normal APPC subsystem shutdown:

APPC: Session Stopped, Session ID=4101, Reason=APPC_Quiesce (APPCLOG 7)

APPC: Session Stopped, Session ID=4102, Reason=APPC_Quiesce (APPCLOG 7)

APPC: Subsystem Stopped. (APPCLOG 1)

A session termination message will be logged for each session that is

deactivated. The Reason ﬁeld in the termination message indicates the

type of shutdown that occurred. (The description of the APPCCONTROL

STOP command in Chapter 2 , “Interactive Control Operator

Commands,”explains all the shutdown types.) QUIESCE, the type that

is seen in the example above, is the default shutdown type.

Shutting down the APPC subsystem does not affect the operation of

SNA/SDLC Link/XL, so any other SNA Services that may be using the

SNA link are not affected.

The SNACONTROL STOP command shuts down SNA/SDLC Link/XL,

which causes all LU-LU sessions on the SNA node to shut down,

including those used for the APPC subsystem. The shutdown type

(QUIESCE, PROTOCOL, or KILL) that you specify in the SNACONTROL

STOP command is the shutdown type for every LU-LU session on the

node you are shutting down. For example, an SNACONTROL STOP

command issued with a shutdown type of KILL (immediate shutdown

of the node) causes a similar termination of all LU-LU sessions on the

node speciﬁed. For information on the SNACONTROL STOP command, see

the SNA Link/XL Node Manager’s Guide.