Create A Terminal Loopback On Intermediate-Node Mxp Or Txp Ports - Cisco NCS 2000 series Troubleshooting Manual

Create a Terminal Loopback on Intermediate-Node MXP or TXP Ports

Warning High-performance devices on this card can get hot during operation. To remove the card, hold it by the
faceplate and bottom edge. Allow the card to cool before touching any other part of it or before placing
it in an antistatic bag. Statement 201
Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this, perform
Caution
an external switch if a switch has not already occurred. Refer to the procedures in the
Lock Initiation, and Clearing, on page
Step 2 Resend test traffic on the loopback circuit with a known-good card installed.
Step 3
If the test set indicates no errors, the problem was probably the defective card. Return the defective card to Cisco through
the RMA process. Contact Cisco Technical Support 1 800 553 2447.
Step 4 Clear the facility loopback from the port:
a) Click the Maintenance > Loopback tabs.
b) Choose None from the Loopback Type column for the port being tested.
c) Choose the appropriate state to place the port in service, out of service and disabled, out of service for maintenance,
or automatically in service from the Admin State column for the port being tested.
d) Click Apply.
e) Click Yes in the confirmation dialog box.
Step 5
Complete the Create a Terminal Loopback on Intermediate-Node MXP or TXP Ports, on page
Create a Terminal Loopback on Intermediate-Node MXP or TXP Ports
In the next troubleshooting test, you perform a terminal loopback on the intermediate-node port to isolate
whether the intermediate client or trunk port is causing circuit trouble. In the example situation in
Terminal Loopback on an Intermediate-Node MXP or TXP Port, on page
performed on an intermediate MXP or TXP port in the circuit. If you successfully complete a terminal loopback
on the node, this node is excluded from possible sources of circuit trouble.
Figure 6: Terminal Loopback on an Intermediate-Node MXP or TXP Port
Caution
Performing a loopback on an in-service circuit is service-affecting.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
18
443.
General Troubleshooting
Protection Switching,
18.
Figure 6:
18, the terminal loopback is