Hitachi GR2000 Series - Manual (Page 301)

Maintenance Procedure
GR2K-GA-0015 8-39
Ver. 07-02
The test types that can be executed also differ depending on the line type. For the
relationships between line types and test types, refer to
test interfaces (WAN) or bert .
Explanation of the test methods by test type as follows.
(1) Internal Loopback Test for WAN Line:
This test loops back the test frame within the NIF. The testing can be executed on
all types of WAN lines by entering
test interfaces and no test interfaces commands
alternatively from the device management terminal.
For example, to test line No. 0 of NIF No. 1, enter the command lines as shown
below:
> test interfaces nif 1 line 0 internal [CR]
(Wait about 1 minute.)
> no test interfaces nif 1 line 0 [CR]
The result will appear as shown in Figure 8-41 where you must make sure that
“Send-NG” and “Receive-NG” are both 0. If “Send-NG” and “Receive-NG” are
both 0, the result is normal.
Figure 8-41 Sample Result of Internal Loopback Test for WAN Line
(2) Loop Connector Loopback Test for WAN Line:
This test loops back the test frame at the loop connector connected to the NIF.
The test can be executed on all types of WAN lines by entering the test interfaces
and no test interfaces commands from the device management terminal. Before
testing, disconnect the cable of the subject line number and replace with a loop
connector of the applicable line type.
*
Note 1:
If “Send-NG” and “Receive-NG” are not 0, there is an apparent problem. Analyze the
result in accordance with a result of the no test interfaces (WAN) information in
GR2000 Operations Commands, Vol. 1.
Note 2:
The test can be executed on the NIF boards OC-3c (8 ports), OC-12c (4 ports), and
OC-48c only when the clock of the configuration definition information line is set to
“independent.” If the clock is set to “external,” a line fault is likely to occur.
> test interfaces nif 1 line 0 internal
You have warning messages. Use "information -w" to see them.
> no test interfaces nif 1 line 0
1999/04/19 17:30:36
Interface type:serial(----)
Test count:40
Send-OK:40Send-NG:0
Receive-OK:40Receive-NG:0
Data compare error:0Out timeout:0
In timeout:0Underrun:0
CRC error:0Overrun:0
Short frame:0Abort:0
Bit error:0Error receive frame:0
Physical down error:none
Out buffer error:noneH/W error:none
Last signal status:00000304
>
Must be 0