Chapter 8: Troubleshooting
Testing link end hardware
Test Ethernet packet errors reported by ODU
Log into the unit and click Administration, Statistics, Detailed Counters. Click Reset System
Counters at the bottom of the page and wait until the Ethernet Rx Packets counter has reached 1
million (the count will only update when the page is refreshed. If the counter does not increment
or increments too slowly, because for example the PTP 650 is newly installed and there is no
offered Ethernet traffic, then abandon this procedure and consider using the procedure
Read the Ethernet Rx Crc And Align counter. The test has passed if this is less than 10.
Test Ethernet packet errors reported by managed switch or router
If the ODU is connected to a managed Ethernet switch or router, it may be possible to monitor the
error rate of Ethernet packets. Please refer to the user guide of the managed network equipment.
The test has passed if the rate of packet errors reported by the managed Ethernet switch or router
is less than 10 in 1 million packets.
Test ping packet loss
Using a computer, it is possible to generate and monitor packets lost between the PSU and the
ODU. This can be achieved by executing the Command Prompt application which is supplied as
standard with Windows and MAC operating systems.
Caution
This procedure disrupt network traffic carried by the PTP 650 under test:
Procedure:
1
Ensure that the IP address of the computer is configured appropriately for connection to
the PTP 650 under test, and does not clash with other devices connected to the network.
2
If the PSU is connected to an Ethernet switch or router then connect the computer to a spare
port, if available.
3
If it is not possible to connect the computer to a spare port of an Ethernet switch or router,
then the PSU will need to be disconnected from the network in order to execute this test:
•
Disconnect the PSU from the network.
•
Connect the computer directly to the LAN port of the PSU.
4
On the computer, open the Command Prompt application.
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