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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.6.2 Perform a Terminal Loopback on a Source-Node FC_MR Port
b. Choose None from the Loopback Type column for the port being tested.
c. Choose the appropriate state (IS; OOS,DSBLD; OOS,MT; IS,AINS) from the Admin State column
for the port being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
Step 4 Complete the “Test the FC_MR Card” procedure on page 1-96.
Test the FC_MR Card
Step 1 Complete the “Physically Replace a Traffic Card” procedure on page 2-273 for the suspected bad card
and replace it with a known-good one.
Step 2 Resend test traffic on the loopback circuit with a known-good card installed.
Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
card to Cisco through the RMA process. Contact Cisco Technical Support at 1 800 553-2447.
Step 4 Complete the “Physically Replace a Traffic Card” procedure on page 2-273 for the faulty card.
Step 5 Clear the facility loopback:
a. Click the Maintenance > Loopback tabs.
b. Choose None from the Loopback Type column for the port being tested.
c. Choose the appropriate state (IS; OOS,DSBLD; OOS,MT; IS,AINS) from the Admin State column
for the port being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
Step 6 Complete the “1.6.2 Perform a Terminal Loopback on a Source-Node FC_MR Port” procedure on
page 1-96.
1.6.2 Perform a Terminal Loopback on a Source-Node FC_MR Port
The terminal loopback test is performed on the node source FC_MR muxponder or transponder port. For
the circuit in this example, the test port is the source FC_MR port in the source node. Completing a
successful terminal loopback to a node source port verifies that the circuit is good to the source port.
Figure 1-39 shows an example of a terminal loopback on a source FC_MR port.
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