Cisco ONS 15454 Troubleshooting Manual page 40

1.5.2 Perform a Terminal (Inward) Loopback on a Source-Node OC-N, G-Series, MXP, or TXP Port
Clear the facility (line) loopback:
Step 5
a.
b.
c.
d.
e.
Complete the
Step 6
Port" procedure on page
1.5.2 Perform a Terminal (Inward) Loopback on a Source-Node OC-N, G-Series,
MXP, or TXP Port
The terminal (inward) loopback test is performed on the node source OC-N, G-Series, MXP, or TXP
port. For the circuit in this example, it is the source OC-N port in the source node. You first create a
bidirectional circuit that starts on the node destination OC-N port and loops back on the node source
OC-N 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.
of a terminal loopback on a source OC-N port.
Note Terminal (inward) loopbacks are not available for E-Series Ethernet, ML-Series Ethernet, and DWDM
cards in R4.6.
Note Terminal (inward) loopbacks are not available for G-Series cards prior to R4.0.
Figure 1-21 Terminal (Inward) Loopback on a Source-Node OC-N Port
Source
ONS Node
OC-N
Test Set
Figure 1-22
Cisco ONS 15454 Troubleshooting Guide, R4.6
1-40
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.
"Perform a Terminal (Inward) Loopback on a Source-Node OC-N, G-Series, MXP, or TXP
1-40.
XC OC-N
shows terminal loopback on a G-Series card.
Intermediate
ONS Node
OC-N XC OC-N
Chapter 1 General Troubleshooting
Figure 1-21 shows an example
Destination
ONS Node
OC-N XC OC-N
November 2004