SNAX/XF and SNAX/APN Configuration and Management Manual

Attributes for SNAX/XF and SNAX/APN
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
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PUIDBLK (PU Objects) - for SNAX/XF
In some cases, the adjacent node might use the HP NonStop identification block and
identification number for validation. In these cases, PUIDNUM and PUIDBLK must
match the parameter or parameters in which the adjacent node defines the
identification block and identification number it expects to receive from the link station
on the NonStop system.
When link stations negotiate their roles, XID validation takes place before negotiation
occurs.
PUIDBLK (PU Objects) - for SNAX/XF
PUIDBLK specifies the block number for the PU.
When PUIDBLK is specified for a PU that is subordinate to a primary line, the attribute
contains the IBM product number found in the IBM Description and Programmer’s
Guide for the device, under the heading of the SDLC XID command.
The value specified for this attribute must match the hexadecimal block number as
given in bits 16 through 27 of an Exchange Identification (XID) response received from
the remote PU. Together, the PUIDBLK and PUIDNUM attributes define the XID to be
used for connections to the PU. These attributes must be specified if XID verification is
desired for PUs that exchange SDLC XID commands and responses.
When PUIDBLK is specified in an ADD PU command, the PUIDNUM attribute must
also be specified. However, either attribute can be specified separately in an ALTER
PU command.
Except for PUs on X.25 lines, PUIDBLK and PUIDNUM must not be omitted for a PU
subordinate to a switched secondary line or for any switched floating PU.
If a nondefault value is used for either the PUIDBLK or the PUIDNUM attribute, the
combination of values must be unique under the line for fixed subordinate primary PUs.
Under the service manager, the combination of values must be unique for switched
floating PUs. Secondary PUs are allowed to have duplicate values for the PUIDBLK-
PUIDNUM combination.
When using SNAX/CM with SNAX/XF, you can duplicate PUIDBLK-PUIDNUM value
combinations on different lines with multiple ports. The same PUIDBLK and PUIDNUM
can be specified for a switched floating PU as were specified for a PU permanently
subordinated to a switched line using either a single port or multiple ports. This change
allows a PU access to several SNAX/XF lines to support larger switched networks.
For a PU subordinate to a secondary line, you can set the PUIDBLK and PUIDNUM
attributes to any values that are unique in the host’s network, but they must match the
IDBLK and IDNUM operands specified for the host’s corresponding PU definition
statement in the IBM NCP and VTAM system definitions.
Default: %hFFF
Value: %h000 - %hFFF
Objects: PU