Cisco ONS 15454 SDH - Create the Terminal (Inward) Loopback on a Source-Node Ethernet Port

1-65
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
July 2005
Chapter 1 General Troubleshooting
1.4.2 Perform a Terminal (Inward) Loopback on a Source-Node Ethernet Port
Figure 1-29 Terminal (Inward) Loopback on a G-Series Port
Caution Performing a loopback on an in-service circuit is service-affecting.
Complete the “Create the Terminal (Inward) Loopback on a Source-Node Ethernet Port” procedure on
page 1-65.
Create the Terminal (Inward) Loopback on a Source-Node Ethernet Port
Step 1 Connect an optical test set to the port you are testing:
Note Refer to the manufacturer’s instructions for detailed information about connection and setup of
the optical test set.
a. If you just completed the “1.4.1 Perform a Facility (Line) Loopback on a Source-Node Ethernet
Port” procedure on page 1-62, leave the optical test set hooked up to the Ethernet port in the source
node.
b. If you are starting the current procedure without the optical test set hooked up to the source port,
use appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are
testing. Both Tx and Rx connect to the same port.
Step 2 Adjust the test set accordingly.
Step 3 Use CTC to set up the terminal (inward) loopback on the test port:
a. In node view, click the Circuits tab and click Create.
b. In the Circuit Creation dialog box, choose the type, such as VC_HO, and number, such as 1.
4 ports
GigE
Processor Subsystem
GBIC 1 SERDES
Main
RX BPIA
Main
TX BPIA
GigE
MAC
GBIC 2 SERDES
GigE
MAC
BACKPLANE
STS48
GBIC 3 SERDES
GigE
MAC
GBIC 4 SERDES
GigE
MAC
Terminal
Loopback
Facility
Loopback
FPGA
Block
Path
Termination
Block
BTC
192
110612
Protect
RX BPIA
Protect
TX BPIA