DETAILED STEPS
Step 1
Complete the
Physically Replace a Card, on page 453
for the suspected bad card and replace it with a known-good one.
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
Warning
Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this, perform
an external switch if a switch has not already occurred. Refer to the procedures in the
Lock Initiation, and Clearing, on page 443
.
Caution
Step 2
Resend test traffic on the loopback circuit with a known-good card.
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 terminal loopback on the port:
a) Double-click the source-node card with the terminal loopback.
b) Click the
Maintenance > Loopback
tabs.
c) Select
None
from the Loopback Type column for the port being tested.
d) 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.
e) Click
Apply.
f)
Click
Yes
in the confirmation dialog box.
The entire circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies to carry live
traffic.
Troubleshooting DWDM Circuit Paths With ITU-T G.709
Monitoring
This section provides an overview of the optical transport network (OTN) specified in ITU-T G.709,
Network
Node Interface for the Optical Transport Network
, and provides troubleshooting procedures for DWDM
circuit paths in the ITU-T G.709 OTN using PM and TCAs.
ITU-T G.709 Monitoring in Optical Transport Networks
ITU-T Recommendation G.709 is part of a suite of recommendations covering the full functionality of an
OTN. ITU-T G.709 enables single-wavelength SONET transparent optical wavelength-based networks. ITU-T
G.709 adds the Operation, Administration, Maintenance, and Provisioning (OAM&P) functionality of
SONET/SDH to DWDM optical networks. It adds extra overhead to existing SONET, Ethernet, or asynchronous
transfer mode (ATM) bit streams for performance management and improvement.
Like traditional SONET networks, ITU-T G.709 optical networks have a layered design (
Transport Network Layers, on page 28
). This structure enables localized monitoring that helps you isolate
and troubleshoot network problems.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
27
General Troubleshooting
Troubleshooting DWDM Circuit Paths With ITU-T G.709 Monitoring
