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Troubleshooting 9145ELB NID Hardware User’s Manual
Running Diagnostics
29
5.3 Running Diagnostics
When you set up a new connection, you can verify the link connectivity using PING prior to
sending data.
5.3.1 PING Testing
You can verify network connectivity with another IP device within the subnet by sending a PING
to the IP address for that device. For PING testing instructions, see the 9145ELB NID Software
User’s Manual.
5.4 Loopback Diagnostics
Use Loopbacks to diagnose a fault on the optical link. Loopbacks can be set at any port; once a
port is in loopback mode, data is looped at the physical level though the particular port. When
performing loopback diagnostics, the 9145ELB uses a unique MAC address, designated as the
Loop Test MAC Address, which is displayed on the Loopback Setup Screen (see the 9145ELB
NID Software User’s Manual). When in loopback mode, the 9145ELB filters and discards all
service frames. Only packets with the predefined Loop Test MAC Address are looped back.
The 9145ELB is configurable to swap the origination and destination MAC Addresses and to
recalculate the looped frame's CRC. Test packets are returned to the source according to the
selected options.
To display current loopback status, configure address swapping and CRC recalculation options,
see the 9145ELB NID Software User’s Manual.
5.5 Troubleshooting the Dual 10G Optical Ethernet Module
This section describes some common LED-indicated states and provides troubleshooting action
you can take.
The table identifies the most common troubleshooting situations for the Dual 10G Optical
Ethernet Module.
L/A SPD State Troubleshooting action
Off Off Port disabled Enable the port.
Amber Amber
Unit is booting
or
interface card is not
registered
Unit takes 15-20 seconds to boot.
Reset the unit: press the reset button
or recycle the power.
Off Red Remote fault enabled Check transmit on remote end.
Red Off Link loss forwarding Check User Port link.
Blinking
Green
Red Tx down, Rx up Check fiber for budget loss
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