Troubleshooting guide

6. Line Testing
197
Date 2006/03/10 00:20:21 UTC
Interface type :100BASE-TX
Test count :30
Send-OK :30 Send-NG :0
Receive-OK :30 Receive-NG :0
Data compare error :0 Out underrun :0
Out buffer hunt error :0 Out line error :0
In CRC error :0 In frame alignment :0
In monitor time out :0 In line error :0
H/W error :none
> activate gigabitethernet 1/1
After the test is completed, check the following:
If both Send-NG and Receive-NG are 0, the line test has successfully completed.
If either Send-NG or Receive-NG is not 0, there might be some sort of problem. See the description
of the no test interfaces command in the manual Operation Command Reference.
6.1.2 Loop connector loopback test
The loop connector loopback test, which loops back frames on the loop connector, is executed to
check for any faults. You can execute this test for all line types.
The test procedure is described below.
1. Use the
inactivate command to put the port to be tested into an inactive state.
2. Remove the cable from the target port, and then connect the loop connector to that port.
#
3. Execute the test interfaces command with the connector parameter specified. Wait about
one minute after the execution of the command.
4. Execute the
no test interfaces command, and then check the displayed results.
5. Remove the loop connector, and then reconnect the cable to the port.
6. Use the
activate command to place the port back into an active state.
#
Note that if the loop connecter is not connected, or if the connected loop connector is
inappropriate for the port, the test might provide invalid results.
You can check the test results in the same way as described in 6.1.1 Internal loopback test.
6.1.3 Loop connectors specification
(1) 10BASE-T/100BASE-TX loop connector
As shown in the following figure, insert the cables into the connector and crimp them by using a
crimping tool.
Figure 6-3: 10BASE-T/100BASE-TX loop connector specification
(2) 10BASE-T/100BASE-TX/1000BASE-T loop connector
1. Create two 6-to-7-cm long twisted pair cables before you start the procedure.