IDNUM


>>-+---------------------+-------------------------------------><
   '-IDNUM--=--id_number-'

statements:

dependencies:

CPNAME; IDBLK; PUTYPE=4,5

Specifies a 5-digit hexadecimal number that identifies the specific device (if PUTYPE=1 or 2) or the specific connection (if PUTYPE=4 or 5). The IDNUM for the device is usually the serial number of the device. The device’s serial number is frequently used for this purpose. You can get this number from the component description manual for the device.

For any switched peripheral node (PUTYPE=1 or 2):

If the node is not a type 2.1 peripheral node, you must code both IDBLK and IDNUM.
For a type 2.1 peripheral node, coding CPNAME is required if the peripheral node supports role negotiation (such as 3172, 3174, and Communications Manager). For external communication adapter type 2.1 peripheral nodes, you must code CPNAME. IDBLK and IDNUM are ignored if you code them. For an APPN connection, if you code IDBLK and IDNUM, code DYNADJCP=YES instead of CPNAME.
If VTAM® is defined as a type 2.1 node, code CPNAME.
See the appropriate product manual for CPNAME and IDBLK and IDNUM values.

For peripheral physical units, VTAM uses IDBLK and IDNUM to build a 48-bit station ID that is used in XID exchange during the dial procedure. That station ID must be unique for each station within the network, not only within the major node.

The station ID is structured as follows:

Bits: Meaning
0–3: Reserved
4–7: PUTYPE
8–15: X'00'
16–27: IDBLK
28–47: IDNUM

For subarea physical units (PUTYPE=4 or 5), code either IDNUM or CPNAME. VTAM uses the IDNUM value to correlate the PU definitions between the two SSCPs that own each end of the switched line. This IDNUM value must be unique for all PU definitions within this SSCP that contain the same subarea number and NETID.

Note: Specify the same IDNUM on the PU definitions in the two SSCPs that own each end of the switched lines.

The node identifier field of an XID contains IDNUM along with a value of X'FFF' as the IDBLK.

For subarea physical units, VTAM uses the subarea number specified on SUBAREA and the IDNUM value to build a station ID that is used in some operator messages. That station ID must be unique for each station within the network, not only within the major node.

The station ID is structured as follows:

Bits: Meaning
0–15: Subarea number
16–27: X'FFF'
28–47: IDNUM