Expand Configuration and Management Manual (G06.24+)

Configuring Expand-Over-X.25 Lines
Expand Configuration and Management Manual—523347-008
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Modifiers for Special Features
Modifiers for Special Features
The following modifiers are provided in the PEXQSNAM profile to enable you to
configure special features:
•
PATHBLOCKBYTES modifier for the multipacket frame feature
•
PATHPACKETBYTES modifier for the variable packet size feature
•
L4CONGCTRL_ON modifier for the congestion control feature
•
SUPERPATH_ON modifier for the Expand multi-CPU feature
For configuration considerations for these features, refer to Section 18, Subsystem
Description. For information about the advantages and disadvantages of these
features, refer to Section 3, Planning a Network Design.
The PATHBLOCKBYTES, PATHPACKETBYTES, L4CONGCTRL_ON, and
SUPERPATH_ON modifiers are described in detail in Section 17, Expand Modifiers.
X25AM Line-Handler Process Modifiers
You might need to set the following X25AM modifier when configuring an X25AM
line-handler process that will be accessed by an Expand-over-X.25 line-handler
process. This modifier is described in detail in the X25AM Configuration and
Management Manual.
L3WINDOWn
Default: 2
Units: Packets
Range: 1 through 15 (L3MOD128), 1 through 7 (L3MOD8)
This modifier specifies the number of packets that can be outstanding without an
acknowledgment from the network. You should set L3WINDOW to the largest possible
value.
PEXQSNAM Modifiers
The disk file $SYSTEM.SYSnn.PEXQSNAM defines modifiers for Expand-over-X.25
line-handler processes.
Table 10-1 lists the default value and range of values for each modifier in this profile, if
applicable. For modifiers that are mutually exclusive, a check mark (3) is shown in the
“Default Value” column to indicate which modifier is present in the profile. For a
complete description of the modifiers listed in this table, refer to Section 17, Expand
Modifiers.
Note. Some X.25 networks limit the size of L3WINDOW. Consult your vendor for more
information.