Cisco ONS 15454 Troubleshooting Manual page 115

Chapter 1 General Troubleshooting
d.
e.
Complete the
Step 4
Test the Ethernet Card
Complete the
Step 1
and replace it with a known-good one.
Resend test traffic on the loopback circuit with a known-good card installed.
Step 2
If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
Step 3
card to Cisco through the RMA process. Contact Cisco Technical Support at 1 800 553-2447.
Complete the
Step 4
Clear the facility loopback:
Step 5
a.
b.
c.
d.
e.
Complete the
Step 6
page
1.5.2 Perform a Terminal Loopback on a Source-Node Ethernet Port
The terminal loopback test is performed on the node source Ethernet port. For the circuit in this example,
it is the source G-Series port in the source node. You first create a bidirectional circuit that starts on the
node destination G-Series port and loops back on the node source G-Series port. You then proceed with
the terminal loopback test. Completing a successful terminal loopback to a node source port verifies that
the circuit is good to the source port.
Terminal loopbacks are not available for R4.0 and earlier G-Series cards.
Note
Terminal loopbacks require on-site personnel.
Note
November 2009
Click Apply.
Click Yes in the confirmation dialog box.
"Test the Ethernet Card" procedure on page
"Physically Replace a Traffic Card" procedure on page 2-273
"Physically Replace a Traffic Card" procedure on page 2-273
Click the Maintenance > Loopback tabs.
Choose None from the Loopback Type column for the port being tested.
Choose the appropriate state (IS; OOS,DSBLD; OOS,MT) from the Admin State column for the port
being tested.
Click Apply.
Click Yes in the confirmation dialog box.
"1.5.2 Perform a Terminal Loopback on a Source-Node Ethernet Port" procedure on
1-71.
1.5.2 Perform a Terminal Loopback on a Source-Node Ethernet Port
1-71.
Figure 1-31 shows terminal loopback on a G-Series port.
Cisco ONS 15454 Troubleshooting Guide, R8.5
for the suspected bad card
for the faulty card.
1-71