General Troubleshooting
This chapter provides procedures for troubleshooting the most common problems encountered when
operating a Cisco ONS 15454 SDH. To troubleshoot specific ONS 15454 SDH alarms, see
"Alarm Troubleshooting."
See the
This chapter includes the following sections on network problems:
1.1 Troubleshooting Non-DWDM Circuit Paths with Loopbacks, page
•
and hairpin circuits, which you can use to test circuit paths through the network or logically isolate
faults
For dense wavelength-division multiplexing (DWDM) network acceptance tests, refer to the
Note
Cisco ONS 15454 DWDM Installation and Operations Guide, as this guide also applies to DWDM
operations for SDH. For SDH network acceptance tests, refer to the Cisco ONS 15454 SDH Procedure
Guide Chapter 5, "Turn Up Network."
1.2 Troubleshooting Electrical Circuit Paths With Loopbacks, page
•
loopback tests described in
isolate trouble on electrical circuits.
1.3 Troubleshooting Optical Circuit Paths With Loopbacks, page
•
loopback tests described in
isolate trouble on STM-N optical circuits.
1.4 Troubleshooting Ethernet Circuit Paths With Loopbacks, page
•
loopback tests described in the
to isolate trouble on G-Series or CE-Series Ethernet circuits.
1.5 Troubleshooting MXP, TXP, or FC_MR Circuit Paths With Loopbacks, page
•
how to use loopbacks tests described
Loopbacks"
(FC_MR) circuits.
•
1.6 Troubleshooting DWDM Circuit Paths With ITU-T G.709 Monitoring, page
how to utilize performance monitoring (PM) and threshold crossing alerts (TCA) to locate signal
degrades on DWDM circuit paths.
The remaining sections describe symptoms, problems, and solutions that are categorized according to
the following topics:
1.7 Using CTC Diagnostics, page
•
LED readiness and downloading a diagnostic file for Cisco Technical Support (TAC).
July 2005
If you cannot find what you are looking for, contact Cisco Technical Support.
"Obtaining Technical Assistance" section on page xlvi
"1.1 Troubleshooting Non-DWDM Circuit Paths with Loopbacks"
"1.1 Troubleshooting Non-DWDM Circuit Paths with Loopbacks"
to isolate trouble on muxponder (MXP), transponder (TXP), or Fibre Channel
C H A P T E R
"1.1 Troubleshooting Non-DWDM Circuit Paths with Loopbacks"
in"1.1 Troubleshooting Non-DWDM Circuit Paths with
1-104—Provides procedures and guidelines for checking card
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
for more information.
1-2—Describes loopbacks
1-9—Explains how to use
1-39—Explains how to use
1-62—Explains how to use
1-80—Explains
1-96—Explains
1
Chapter 2,
to
to
1-1