Switched peripheral PUs attached to an NCP are defined by VTAM® with one or more switched major nodes and an NCP major node. Consider, for example, the configuration shown in Figure 1. The switched major node SWND3AB7 defines three PUs, the paths to each PU, and the LUs associated with each PU, as shown in the following excerpt. The corresponding NCP major node, which defines the switched line groups, is shown and discussed in NCP-attached switched peripheral PUs.

SWND3AB7 VBUILD TYPE=SWNET,MAXNO=35,MAXGRP=9
*********************************************************************
*
*  AUTOMATIC DIAL IN/OUT GROUPS - GP3AAIO1, GP3AAIO2
*
*********************************************************************
*
*  NCP SWITCHED SDLC CONNECTION TO PU_T2.0
*
*********************************************************************
SWPUAIO1 PU    ADDR=01,IDBLK=001,IDNUM=00001,                          X
               MAXPATH=1,MAXDATA=256,                                  X
               PUTYPE=2,MAXOUT=1,PASSLIM=1,                            X
               ISTATUS=INACTIVE,IRETRY=NO,DISCNT=YES,                  X
               SSCPFM=USSSCS
PATHAIO1 PATH  DIALNO=PATH21A-890-3333,PID=1,GID=1,GRPNM=GP3AAIO1
SL1DAIO1 LU    LOCADDR=1,PACING=(1,1),VPACING=2,                       X
               MODETAB=MODETAB2
SL1DAIO2 LU    LOCADDR=2,                                              X
               PACING=(1,1),VPACING=2,ISTATUS=ACTIVE
SL1DAIO3 LU    LOCADDR=3,                                              X
               PACING=(1,1),VPACING=2,ISTATUS=ACTIVE
*--------------------------------------------------------------------
*
*  NCP SWITCHED SDLC CONNECTION TO LEN PU_T2.1
*
*--------------------------------------------------------------------
SWPUADO2 PU    ADDR=09,IDBLK=009,IDNUM=00009,CPNAME=LEN090,            X
               MAXPATH=1,MAXDATA=256,                                  X
               PUTYPE=2,MAXOUT=1,PASSLIM=1,                            X
               ISTATUS=INACTIVE,IRETRY=NO,DISCNT=YES,                  X
               SSCPFM=USSSCS,CONNTYPE=LEN
PATHADO2 PATH  DIALNO=PATH21D-890-3333,PID=4,GID=1,GRPNM=GP3AADO2
SL2IADO1 LU    LOCADDR=0,PACING=(1,1),VPACING=2,                       X
               MODETAB=MODETAB2,RESSCB=1
SL2IADO2 LU    LOCADDR=0,RESSCB=2,                                     X
               PACING=(1,1),VPACING=2,ISTATUS=ACTIVE
*--------------------------------------------------------------------
*
*  NCP SWITCHED SDLC CONNECTION TO LEN PU_T2.1
*
*--------------------------------------------------------------------
SWPUADO3 PU    ADDR=10,IDBLK=010,IDNUM=00010,                          X
               MAXPATH=1,MAXDATA=256,                                  X
               PUTYPE=2,MAXOUT=1,PASSLIM=1,                            X
               ISTATUS=INACTIVE,IRETRY=NO,DISCNT=YES,                  X
               SSCPFM=USSSCS,ANS=CONTINUE,CONNTYPE=LEN
PATHADO3 PATH  DIALNO=PATH21E-890-3333,PID=5,GID=1,GRPNM=GP3AADO2
SL3DADO1 LU    LOCADDR=6,PACING=(1,1),VPACING=2,                       X
               MODETAB=MODETAB2
SL3IADO2 LU    LOCADDR=0,RESSCB=1,                                     X
               PACING=(1,1),VPACING=2,ISTATUS=ACTIVE

The PATH statement defines the path to the PU:

• DIALNO specifies the dial information used to initiate the connection with a PU over the switched link. Thus, PATHAIO1 specifies PATH21A-890-3333 as the dial information used to initiate a connection with SWPUAIO1 over the line LN3AAIO1 (defined in the NCP major node).
• GRPNM identifies the name of a GROUP statement in the corresponding NCP major node that defines a group of SDLC switched links. Thus, PATHAIO1 in the switched major node identifies GP3AAIO1 as the name of the switched line group defined by the NCP major node.