Cisco ONS 15454 Troubleshooting Manual page 50

1.5.5 Create a Terminal (Inward) Loopback on Intermediate-Node OC-N, G-Series, MXP, or TXP Ports
Test the OC-N, G-Series, MXP, or TXP Card
Note This procedure does not apply to Software R4.6 E-Series Ethernet, ML-Series Ethernet, and DWDM
cards.
Step 1 Complete the
replace it with a known-good one.
Resend test traffic on the loopback circuit with a known-good card installed.
Step 2
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 TAC (1 800 553-2447).
Complete the
Step 4
Clear the facility (line) loopback from the port:
Step 5
a.
b.
c.
d.
e.
Step 6 Clear the facility loopback circuit:
a.
b.
c.
d.
Complete the
Step 7
procedure on page
1.5.5 Create a Terminal (Inward) Loopback on Intermediate-Node OC-N,
G-Series, MXP, or TXP Ports
In the next troubleshooting test, you perform a terminal loopback on the intermediate-node port to isolate
whether the destination port is causing circuit trouble. In the example situation in
terminal loopback is performed on an intermediate OC-N port in the circuit. You first create a
bidirectional circuit that originates on the source node OC-N, G-Series, MXP, or TXP port and loops
back on the intermediate-node port. You then proceed with the terminal loopback test. If you
successfully complete a terminal loopback on the node, this node is excluded from possible sources of
circuit trouble.
Cisco ONS 15454 Troubleshooting Guide, R4.6
1-50
"Physically Replace a Card" procedure on page 2-219
"Physically Replace a Card" procedure on page 2-219
Click the Maintenance > Loopback tabs.
Choose None from the Loopback Type column for the port being tested.
Choose the appropriate state (IS, OOS, OOS_AINS) from the State column for the port being tested.
Click Apply.
Click Yes in the confirmation dialog box.
Click the Circuits tab.
Choose the loopback circuit being tested.
Click Delete.
Click Yes in the Delete Circuits dialog box.
"Create a Terminal Loopback on Intermediate-Node OC-N, G-Series, MXP, or TXP Ports"
1-51.
Chapter 1 General Troubleshooting
for the suspected bad card and
for the faulty card.
Figure 1-25, the
November 2004