Cisco Systems 11.0 BT manual IDBLK=05D

VTAM Host Configuration Considerations for Dynamic LU Allocation

		Figure 2	VTAM Host Values Defining LUSEED and LUGROUP
Example VTAM host values defining LUSEED and LUGROUP name parameters:
TN3270PU	PU	.		*	define other PU parameters
		IDBLK=05D,
		IDNUM=30001,
		LUSEED=TN3X1###,		*	define the seed component of the LU names
					created by DDDLU (e.g. LOCADDR 42 will have
					the name TN3X1042)
		LUGROUP=AGROUP		*	define the LU group name
*
TN3X1100	LU	LOCADDR=100,		*	define a terminal which requires a
		MODETAB=AMODETAB			specific LU name
*
TN3X1101	LU	LOCADDR=101,		*	define a printer which requires a specific
		DLOGMODE=M3287CS			LU name
Example VTAM host values defining LUGROUPname, AGROUP:
AGROUP	LUGROUP			*	define LU group to support various
					terminal types
327802E	LU	USSTAB=USSXXX,		*	define template to support IBM 3278
		LOGAPPL=TPXP001,			terminal model 2 with Extended Data
		DLOGMOD=SNX32702,			Stream. Note that the USS messages in
		SSCPFM=USS3270			USSXXX should be in 3270 datastream.
3278S2E	LU	USSTAB=USSYYY,		*	define template to support IBM 3278
		LOGAPPL=TPXP001,			terminal model 2 with Extended Data
		DLOGMOD=SNX32702,			Stream, for TN3270E clients requesting
		SSCPFM=USSSCS			BIND-IMAGE.
327805	LU	USSTAB=USSXXX,		*	define template to support IBM 3279
		LOGAPPL=TPXP001,			terminal model 5
		DLOGMOD=D4C32785,
		SSCPFM=USS3270
@	LU	USSTAB=USSXXX,			this is the default template to match any
		LOGAPPL=TPXP001,			other terminal types
		DLOGMOD=D4A32772,
		SSCPFM=USS3270

With the configuration shown in Figure 2 defined in the host, the ACTPU sent by VTAM for the PU TN3270PU will have the “Unsolicited NMVT Support” set in the system services control point (SSCP) capabilities control vector. This allows the PU to dynamically allocate LUs by sending NMVT with a “Reply Product Set ID” control vector.

After the TN3270 server sends a positive response to the ACTPU, it will wait for VTAM to send ACTLUs for all specifically defined LUs. In the sample configuration shown in Figure 2, ACTLUs will be sent for TN3X1100 and TN3X1101. The server sends a positive response and sets SLU DISABLED. The LOCADDR of these LUs are put into the specific LU cache and reserved for specific LU name requests only.

To allow sufficient time for the VTAM host to send all the ACTLUs, a 30-second timer is started and restarted when an ACTLU is received. When the time expires, it is assumed all ACTLUs defined in VTAM for the PU have been sent. All LUs that have not been activated are available in a generic LU pool to be used for DDDLU unless they have been reserved by the configuration using the generic-pool deny TN3270 configuration command.

Configuring TN3270 Server on the Channel Interface Processor 9