CP6100 I/O Process Programming Manual
Using CP6100: Managing Lines
To monitor a line for quality problems--really, to monitor the
whole link between the NonStop System and the remote station--
you use the CMI STATUS LINE command. That command has several
options:
• If you type only STATUS LINE and the name of the line, the
command displays general information like the logical device
and subchannel numbers, the frame size for transfers between
the line and its controller, and the line state expressed as
an octal value with a series of short descriptive messages.
• If you add the DETAIL option to the command, it displays
statistics information for the line. It reports the number
of frames transferred between the I/O process and LIUs; the
number of errors in those frames; the number of times the
I/O process has had to retry requests to LIUs; and the number
of path switches that have occurred. Figure 3-3 shows the
format of this information.
• If you add the RESET option to the command, it not only shows
statistics, but also clears them. This option is useful for
measuring occurrences over a specific period of time; you
reset statistics at the beginning of the period, and observe
them at the end.
The STATUS command displays only statistics kept by the I/O
process; it does not display the more detailed statistics
maintained by the protocol. Still, if you use the RESET
option, both sets of statistics are cleared. If you never use
the RESET option, protocol statistics are cleared when the LIU
is downloaded, and process statistics are never cleared.
(For information about how a program can obtain protocol
statistics, see the manual describing the protocol.)
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| |
| >status line $cap6,detail |
| CP6100 LINE STATUS |
| STATE: STARTED |
| PATH A CSM LDEV 25 |
| CU-PRIMARY %354 CU-BACKUP %314 |
| |
| CLB FRAME SIZE 300 |
| CONFIG BLK SIZE 11 |
| |
| NUMBER OF SUPPLIED STATISTICS 6 |
| LIU MSGS ERRORS |
| INPUT 52 0 |
| OUTPUT 52 0 |
| LIU RETRIES 0, CLIP PATH ERRORS 0 |
| |
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Figure 3-3. Excerpt from STATUS LINE, DETAIL
October 1985
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