The format of the Configuration Parameters section of the
TTGEN Configuration File is as follows. Suggested values for these
parameters are provided in the /opt/acc/cfg/x25_loop.answ file
that is provided with the X.25/ACC product.
Configuration
System-Name "ZCOM API Intro - E1/T1 system"
Program-ZLU 20
Terminal_ZLU 1000
Logical-Term 1000
Physical-Term 1000
Buffer-Pool 3000000
Logical_size 252
Logical-data 10 X25CNT,0,X25CNT_LDSIZE
Queue-limit 4000
Transmit-limit 100
Unack-limit 5000
Port-Limit 20000
E1T1-Port-limit 100000
node-entry 1
|
Note that only the parameters that will ever likely be modified
are described here. For additional information, refer to the ACC
Utilities Reference Guide.
System-Name |
 |
ASCII string which describes this configuration. Maximum of
79 characters. Include the double quotes as shown. This string is
only used by ZCOM Message System utilities ZSCAN and ZMNTR.
Terminal-ZLU |
|
This number is set to the largest ZLU value that is used by
the ZCOM Mux subsystem.
For the X.25/ACC product, the ZLUs are dynamically allocated
on an as-needed basis. One ZLU is allocated for each Level 2 X.25
connection and each Virtual Circuit when x25init is
used to start up a link. These ZLUs are dynamically deallocated
when the Level 2 and Level 3 connections are closed using x25stop. The ZLUs that are dynamically allocated
start at the first unused ZLU number (usually 1).
The x25_loop.answ file
that is provided with the X.25/ACC product contains PORTTEST and MONITOR term
entries. The ZLU numbers used for these must also be taken into
consideration when setting the Terminal-ZLU parameter.
An error will be reported if the number of ZLUs in the configuration
is not large enough. The largest valid Terminal-ZLU value is 65535.
This value must not be greater than N2Z_MAX_ZLU which is described
in Appendix D “Tuning and Sizing” That is, the N2Z_MAX_ZLU tunable must
be set to a value equal to or greater than the Terminal-ZLU parameter.
Logical-Term |
|
This number is set to the maximum number of ZLUs that will
be used by the ZCOM Mux subsystem. Note that each X.25 link and
each configured Virtual Circuit uses one ZLU.
This is different from the Terminal-ZLU parameter in that
the Terminal-ZLU parameter configures a range of ZLUs, whereas the Logical-Term
parameter configures the number of ZLUs that can be used. Generally,
you should use the same value as the Terminal-ZLU parameter.
The largest valid value is 65535.
Physical-Term |
|
Use the same value as was used for the Logical-Term parameter.
Buffer-Pool |
|
The default of 3 Mbytes is normally adequate for most systems;
however this parameter may need to be increased in systems with
more than 16 physical links (or a very large number of VCs). Refer
to the discussion of zcom_mem_size in Appendix D “Tuning and Sizing” See also the discussion of Buffer-Pool in
Section 2, TTGEN-ZCOM System Table Generator, in the ACC
Utilities Reference Guide. Methods for estimating required
buffer sizes are suggested in these references.
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