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Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Chapter6 Card and Service Configuration
DS3 Loopback Test
Note Note: Do not use oldclrlock while another instance of oldiags is running on the shelf.
oldsplog <log_name>
The oldsplog command displays the log files that are automatica lly cre ate d each tim e a diagnos tic test
is performed. Log files are named onlinediag.MONTHDAY_hh:mm. The files are saved in C:DIAG.
If oldsplog is run without a variable, the most recent log file will be displayed by default.
The log_name variable is used to view an older file or a file that resides in a directory other than
C:DIAG. If the file to be viewed is s aved in C :DIAG, only the name of the fil e n eed s to be entered. A
full path name can also be used if the file resides outside the default directory.
oldsplog can be run from either the active or s tan d by P X M1. Log files are saved on each individual
PXM1 and must be viewed separately.
oldclralm <slot_number>
The oldclralm command clears Online Diagnostic alarms.
The variable <slot_number> is used to specify whic h PXM1 slot is to be cleare d. T h is var i able is
mandatory.
oldclralm can only b e run f r om th e act ive P XM1 .
DS3 Loopback Test
This section contains instructions to test DS3 loopback functionality using CLI commands.

Loopback Tests

Configure Loopback on the Entire DS3 Lin e

To verify that the loopback can be configured on the entire DS3 line:
Step 1 Select a node with PXM-T3 back c ar d.
Step 2 Configure the line using cnfln -felpbnum 30.
Step 3 Check that dsplog does not show any errors or alarms log ged.
Step 4 Using dspln, check that FarEndLoopbkLineNum has been configured to be ds3line.
Pass Criteria:
•No errors logged on the console or the log due to configuring loopback on PXM-T3.
•Configured loopback can be displayed using dspln.