Cisco ONS 15454 DWDM Manual
  1. Manuals
  2. Brands
  3. Cisco Manuals
  4. Network Hardware
  5. ONS 15454 DWDM
  6. Manual
Cisco ONS 15454 DWDM Manual

Cisco ONS 15454 DWDM Manual

Hide thumbs Also See for ONS 15454 DWDM:
Table of Contents

Advertisement

Quick Links

Download this manual
General Troubleshooting
This chapter provides procedures for troubleshooting the most common problems encountered when
operating a Cisco ONS 15454 DWDM shelf in ANSI or ETSI platforms. To troubleshoot specific alarms,
see
Chapter 2, "Alarm Troubleshooting."
Technical Support (1-800-553-2447).
Alarms can occur even in those cards that are not explicitly mentioned in the Alarm sections. When an
alarm is raised, refer to its clearing procedure.
In this chapter, "ONS 15454" refers to both ANSI and ETSI versions of the platform unless otherwise
Note
noted.
This chapter includes the following sections on network problems:
For dense wavelength division multiplexing (DWDM) network acceptance tests, refer to the
Note
Cisco ONS 15454 DWDM Procedure Guide.
1.1 Loopback Description, page
•
and terminal) that can be run along with general loopback behavior and card loopback behavior.
1.2 Troubleshooting MXP or TXP Circuit Paths With Loopbacks, page
•
loopbacks tests described in
muxponder (MXP) and transponder (TXP) circuits.
1.3 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:
1.4 Using CTC Diagnostics, page
•
diagnostic file for Cisco Technical Support.
1.5 Restoring the Database and Default Settings, page
•
software data and restoring the node to the default setup.
1.6 PC Connectivity Troubleshooting, page
•
network connectivity to the ONS 15454.
1.7 CTC Operation Troubleshooting, page
•
Cisco Transport Controller (CTC) login or operation problems.
78-17742-02
If you cannot find what you are looking for, contact Cisco
1-2—Explains in general terms the types of loopback tests (facility
"1.1 Loopback Description" section on page 1-2
1-32—Explains how to perform card LED tests and download a
1-36—Provides troubleshooting procedures for PC and
1-41—Provides troubleshooting procedures for
Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1
C H A P T E R
1-7—Explains how to use
to isolate trouble on
1-24—Explains
1-35—Provides procedures for restoring
1
1-1

Advertisement

Table of Contents
loading

Related Manuals for Cisco ONS 15454 DWDM

Summary of Contents for Cisco ONS 15454 DWDM

  • Page 1 General Troubleshooting This chapter provides procedures for troubleshooting the most common problems encountered when operating a Cisco ONS 15454 DWDM shelf in ANSI or ETSI platforms. To troubleshoot specific alarms, Chapter 2, “Alarm Troubleshooting.” If you cannot find what you are looking for, contact Cisco Technical Support (1-800-553-2447).

  • Page 2: Loopback Description

    Chapter 2, “Alarm Troubleshooting.” For more information about these operations, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide. In CTC, a facility loopback is sometimes called “facility (line)” loopback, and a terminal loopback is Note sometimes called a “terminal (inward)”...

  • Page 3: General Behavior

    Ensure that the facility being loopbacked is not being used by the node for line timing. If it is, a timing Caution loop will be created. 1.1.1.2 Card Behavior Port loopbacks either terminate or bridge the loopback signal. All MXP and TXP facility loopbacks are terminated as shown in Table 1-1. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 78-17742-02...

  • Page 4: Terminal Loopbacks

    Locked-enabled,maintenance & loopback service state and the remaining client and trunk ports can be in any other service state. 1.1.2 Terminal Loopbacks The following sections give general information about terminal loopback operations and specific information about ONS 15454 card loopback activity. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 78-17742-02...
  • Page 5 If the port bridges a loopback signal, the signal loops back to the originating port and is also transmitted downstream. Client card terminal loopback bridging and terminating behaviors are listed in Table 1-2. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 78-17742-02...
  • Page 6 The loopback itself is listed in the Conditions window. For example, the window would list the LPBKTERMINAL condition or LPBKFACILITY condition for a tested port. (The Alarms window would show the AS-MT condition, which indicates that all alarms are suppressed on the port during loopback testing.) Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 78-17742-02...

  • Page 7: Perform A Facility Loopback On A Source-Node Mxp Or Txp Port

    MXP and TXP card client ports do not appear when you click the Maintenance > Loopback tab unless they have been provisioned. Do this in the card view by clicking the Provisioning > Pluggable Port Modules tab. For information about provisioning client ports, refer to the Cisco ONS 15454 DWDM Procedure Guide.
  • Page 8 Use appropriate cabling to attach the transmit (Tx) and receive (Rx) terminals of the optical test set to the port you are testing. The Tx and Rx terminals connect to the same port. Adjust the test set accordingly. (Refer to manufacturer instructions for test set use.) Step 2 Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 78-17742-02...
  • Page 9 Step 4 Test the MXP or TXP Card Complete the “Physically Replace a Card” procedure on page 2-172 for the suspected bad card and Step 1 replace it with a known-good one. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 78-17742-02...
  • Page 10 “2.8.1 Protection Switching, Lock Initiation, and Clearing” section on page 2-167. For more information, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide. Resend test traffic on the loopback circuit with a known-good card installed.
  • Page 11 “1.2.1 Perform a Facility Loopback on a Source-Node MXP or TXP Port” procedure on page 1-7, leave the optical test set hooked up to the MXP or TXP port in the source node. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-11 78-17742-02...
  • Page 12 Step 4 Test the MXP or TXP Card Complete the “Physically Replace a Card” procedure on page 2-172 for the suspected bad card and Step 1 replace it with a known-good one. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-12 78-17742-02...

  • Page 13: Create A Facility Loopback On An Intermediate-Node Mxp Or Txp Port

    “2.8.1 Protection Switching, Lock Initiation, and Clearing” section on page 2-167. For more information, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide. Resend test traffic on the loopback circuit with a known-good card.
  • Page 14 Select Facility (Line) from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port. Click Apply. Step 7 Step 8 Click Yes in the confirmation dialog box. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-14 78-17742-02...

  • Page 15: Test And Clear The Mxp Or Txp Port Facility Loopback Circuit

    “2.8.1 Protection Switching, Lock Initiation, and Clearing” section on page 2-167. For more information, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide. Resend test traffic on the loopback circuit with a known-good card installed.

  • Page 16: Create A Terminal Loopback On Intermediate-Node Mxp Or Txp Ports

    Performing a loopback on an in-service circuit is service-affecting. Caution Terminal loopbacks require on-site personnel. Note Complete the “Create a Terminal Loopback on Intermediate-Node MXP or TXP Ports” procedure on page 1-17. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-16 78-17742-02...

  • Page 17: Test And Clear The Mxp Or Txp Terminal Loopback Circuit

    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. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-17...
  • Page 18 “2.8.1 Protection Switching, Lock Initiation, and Clearing” section on page 2-167. For more information, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide. Resend test traffic on the loopback circuit with a known-good card.
  • Page 19 Click the Maintenance > Loopback tabs. Select OOS,MT (or locked,maintenance) from the Admin State column. If this is a multiport card, select the row appropriate for the desired port. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-19 78-17742-02...
  • Page 20 “2.8.1 Protection Switching, Lock Initiation, and Clearing” section on page 2-167. For more information, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide. Resend test traffic on the loopback circuit with a known-good card installed.
  • Page 21 Performing a loopback on an in-service circuit is service-affecting. Note Terminal loopbacks require on-site personnel. Complete the “Create the Terminal Loopback on a Destination-Node MXP or TXP Port” procedure on page 1-22. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-21 78-17742-02...
  • Page 22 If the test set is not already sending traffic, send test traffic on the loopback circuit. Step 1 Examine the test traffic being received by the test set. Look for errors or any other signal information Step 2 that the test set is capable of indicating. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-22 78-17742-02...
  • Page 23 “2.8.1 Protection Switching, Lock Initiation, and Clearing” section on page 2-167. For more information, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide. Resend test traffic on the loopback circuit with a known-good card.

  • Page 24: Troubleshooting Dwdm Circuit Paths With Itu-T G.709 Monitoring

    A client signal such as SONET, Gigabit Ethernet, IP, ATM, Fibre Channel, or enterprise system connection (ESCON) is mapped to a client payload area and combined with an overhead to create the optical channel payload unit (OPUk). Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-24 78-17742-02...

  • Page 25: Performance Monitoring Counters And Threshold Crossing Alerts

    PM read points that are useful in identifying DWDM circuit points of failure. The “Performance Monitoring” chapter in the Cisco ONS 15454 DWDM Reference Manual lists all PM parameters and provides block diagrams of signal entry points, exit points, and interconnections between the individual circuit cards.
  • Page 26 They are usually associated with rate, counter, and percentage parameters that are available at transponder monitoring points. The “Performance Monitoring” chapter in the Cisco ONS 15454 DWDM Reference Manual contains more information about these alerts. Select and complete the following procedures according to your network parameters.

  • Page 27: Provision Individual Card Bbe Or Ses Thresholds In Ctc

    In node view (single-shelf mode) or shelf view (multishelf mode), double-click the applicable transponder Step 1 or muxponder card (TXP_MR_10G, TXPP_MR_2.5G, or MXP_2.5G_10G.) Step 2 Click the Provisioning > OTN > G.709 Thresholds tabs (Figure 1-12). Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-27 78-17742-02...
  • Page 28 The parameter LOCN specifies the location associated with the particular command. • The parameter TMPER is optional and is an accumulation time period for performance counters, • with possible values of 1-DAY, 1-HR, 1-MIN, 15-MIN, and RAW-DATA. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-28 78-17742-02...

  • Page 29: Provision Optical Tca Thresholds

    1.3.5 Performance Monitoring Counters and Threshold Crossing Alerts For a more information about this command and a list of TL1 commands, refer to the Note Cisco SONET TL1 Command Guide at the following link: http://www.cisco.com/en/US/products/hw/optical/ps2006/products_command_reference_book 09186a0080483b9b.html Provision Optical TCA Thresholds Complete the following procedure to provision TCA thresholds in CTC.

  • Page 30: Forward Error Correction

    In the Bit Errors Corrected field, enter a threshold number, for example 225837. Step 4 In the Uncorrectable Words field, enter a threshold number, for example, 2. Step 5 In the Intervals area, click 15 Min. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-30 78-17742-02...
  • Page 31 Check the patchcord on the 4MD-xx.x or AD1B-xx.x card. There is a degraded patchcord between the ADxB-xx.x and 4MD-xx.x cards. Possible Cause If an optical band bypass exists along the line, check the band connectors. Recommended Action Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-31 78-17742-02...

  • Page 32: Using Ctc Diagnostics

    The problem is in the intercabinet signal path preceding the transponder. Refer Recommended Action to the Cisco ONS 15454 DWDM Procedure Guide for more information about configurations and acceptance tests for this area. You have a laser bias current (LBC) TCA on a single transponder.

  • Page 33: Retrieve Diagnostics File Button

    This audit trail is considered a record-keeping feature rather than a troubleshooting feature. Information about the feature is located in the “Maintain the Node” chapter of the Cisco ONS 15454 DWDM Procedure Guide. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1...

  • Page 34: Off-Load The Diagnostics File

    Open Shortest Path First (OSPF) networks. This tool, located in network view, is shown in Figure 1-16. It executes an internal dump command to retrieve information about all nodes accessible from the entry point. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-34 78-17742-02...

  • Page 35: Restoring The Database And Default Settings

    Select Node drop-down list. To create the dump, click Retrieve. (To clear the dump, click Clear.) The contents of the dump file can be saved or printed and furnished to Cisco Technical Support for use in OSPF network support.

  • Page 36: Pc Connectivity Troubleshooting

    Netscape 7 browser (PC or Solaris 8 or 9 with Java plug-in 1.4.2 or 5.0) • PC platforms with Java plug-in 1.4.2 or 5.0 • Internet Explorer 6.0 browser (on PC platforms with Java plug-in 1.4.2 or 5.0) • Mozilla 1.7 (Solaris only) Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-36 78-17742-02...

  • Page 37: Unsupported Platforms And Browsers

    Open a DOS command window by selecting Start > Run from the Start menu. Step 1 In the Open field, type command and then click OK. The DOS command window appears. Step 2 Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-37 78-17742-02...

  • Page 38: Browser Login Does Not Launch Java

    In the Java Plug-in Control Panel window, double-click the Java Plug-in 1.4.2 icon. Step 4 Click the Advanced tab on the Java Plug-in Control Panel. Step 5 Navigate to C:\ProgramFiles\JavaSoft\JRE\1.4.2. Step 6 Select JRE 1.4. Step 7 Click Apply. Step 8 Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-38 78-17742-02...

  • Page 39: Reconfigure The Browser

    The CAT-5 cable is not plugged in properly. Confirm that both ends of the cable are properly inserted. If the cable is not Recommended Action fully inserted due to a broken locking clip, the cable should be replaced. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-39 78-17742-02...
  • Page 40 Recommended Action Often, cabling is damaged due to pulling or bending. (For information about installing cable, refer to the “Install Cards and Fiber-Optic Cable” chapter in the Cisco ONS 15454 DWDM Procedure Guide.) Incorrect type of CAT-5 cable is being used.

  • Page 41: Ctc Operation Troubleshooting

    After the TCC2/TCC2P card completes resetting, it broadcasts its IP address. The Sniffer software on Step 4 your PC will capture the IP address being broadcast. 1.7 CTC Operation Troubleshooting This section contains troubleshooting procedures for CTC login or operation problems. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-41 78-17742-02...

  • Page 42: Unable To Launch Ctc Help After Removing Netscape

    Step 2 In the Internet Options window, click the Programs tab. Step 3 Click the Internet Explorer should check to see whether it is the default browser check box. Step 4 Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-42 78-17742-02...

  • Page 43: Unable To Change Node View To Network View

    Note Before proceeding with the following steps, ensure that your system has a minimum of 1 GB of RAM. If your system does not have a minimum of 1 GB of RAM, contact the Cisco Technical Assistance Center (TAC). Close all open CTC sessions and browser windows.
  • Page 44 Click Yes when the warning message appears. Step 6 Click OK in the System Scan Properties dialog box. Step 7 Click OK in the Task Properties window. Step 8 Close the McAfee VirusScan window. Step 9 Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-44 78-17742-02...

  • Page 45: Ctc Does Not Launch

    1.7.6 Slow CTC Operation or Login Problems You experience slow CTC operation or have problems logging into CTC. Symptom Table 1-3 describes the potential cause of the symptom and the solution. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-45 78-17742-02...

  • Page 46: Delete The Ctc Cache File Automatically

    To avoid network performance issues, Cisco recommends managing Note a maximum of 50 nodes concurrently with CTC. To manage more than 50 nodes, Cisco recommends using Cisco Transport Manager (CTM). Cisco does not recommend running multiple CTC sessions when managing two or more large networks.

  • Page 47: Delete The Ctc Cache File Manually

    Click the Modified column in the Search Results dialog box to find the JAR files that match the date Step 3 when you downloaded the files from the TCC2/TCC2P. Highlight the files and press the keyboard Delete key. Step 4 Click Yes in the Confirm dialog box. Step 5 Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-47 78-17742-02...

  • Page 48: Node Icon Is Gray On Ctc Network View

    Java programming language, you need the correct JRE installed. The correct JRE for each CTC software release is included on the Cisco ONS 15454 software CD. Complete the “Launch CTC to Correct the Core Version Build” procedure on page 1-49.

  • Page 49: Different Ctc Releases Do Not Recognize Each Other

    ONS node running a CTC core version of 2.2 or lower and then attempt to log into another ONS node in the network running a higher CTC core version, the lower version node does not recognize the new node. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-49 78-17742-02...

  • Page 50: Verify Correct Username And Password

    Step 2 Contact your system administrator to verify the username and password. Call Cisco Technical Support (1-800-553-2447) to have them enter your system and create a new user Step 3 name and password. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1...

  • Page 51: Dcc Connection Lost

    The IP capabilities of the ONS 15454 require specific calculations to properly design Possible Cause IP subnets. Cisco provides a free online tool to calculate and design IP subnets. Go to Recommended Action http://www.cisco.com/techtools/ip_addr.html. For information about ONS 15454 IP capability, refer to the “Management Network Connectivity”...

  • Page 52: Holdover Synchronization Alarm

    This alarm is raised when the last reference input fails. See the “HLDOVRSYNC” alarm on page 2-65 for a detailed description. The ONS 15454 supports holdover timing per Telcordia GR-436 when provisioned for external Note (BITS) timing. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-52 78-17742-02...

  • Page 53: Free-Running Synchronization Mode

    Refer to the procedures in the “2.8.1 Protection Switching, Lock Initiation, and Clearing” section on page 2-167. For more information, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-53...

  • Page 54: Fiber And Cabling

    Laser radiation presents an invisible hazard, so personnel should avoid exposure to the laser beam. Personnel must be qualified in laser safety procedures and must use proper eye protection before working on this equipment. Statement 300 Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-54 78-17742-02...

  • Page 55: Crimp Replacement Lan Cables

    Table 1-5 LAN Cable Pinout Color Pair Name white/orange Transmit Data + orange Transmit Data – white/green Receive Data + blue — white/blue — green Receive Data – white/brown — brown — Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-55 78-17742-02...
  • Page 56 SFP or XFP determines the maximum distance that traffic can travel from the card to the next network device. For a description of SFPs and XFPs and their capabilities, refer to the Cisco ONS 15454 DWDM Reference Manual. SFPs and XFPs are hot-swappable and can be installed or removed while the card or shelf assembly is powered and running.
  • Page 57 Check the label to verify that you are using a compatible SFP or XFP for the card where you want to Step 2 install the connector. Table 1-7 shows the compatible SFPs and XFPs. Only use SFPs/XFPs certified for use in Cisco ONSs. The qualified Cisco SFP/XFP pluggable module Caution top assembly numbers (TANs) are provided in Table 1-7.

  • Page 58: Power Supply Problems

    Step 5 To change the payload type of an SFP or XFP (called pluggable port modules [PPMs] in CTC), refer to the “Provision Transponder and Muxponder Cards” chapter in the Cisco ONS 15454 DWDM Procedure Guide. 1.10 Power Supply Problems This section explains problems related to loss of power or power supply low voltage.

  • Page 59: Isolate The Cause Of Power Supply Problems

    UPS manufacturer’s documentation for specific instructions. Check for excessive power drains caused by other equipment, such as generators. Check for excessive power demand on backup power systems or batteries when alternate power sources are used. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-59 78-17742-02...

  • Page 60: Power Up Problems For Node And Cards

    Improper power supply. Possible Cause Refer to the power information in the “Hardware Specifications” appendix of Recommended Action the Cisco ONS 15454 DWDM Reference Manual. 1.12 Network Level (Internode) Problems The following network-level troubleshooting is discussed in this section: Fiber cut detection •...
  • Page 61 The ALS protocol (refer to the “Network Optical Safety—Automatic Laser Shutdown” section in the “Network Reference” chapter of the Cisco ONS 15454 DWDM Reference Manual) is activated in the event of a fiber cut, resulting in the shutdown of optical power on both of the fibers belonging to the affected span, even if only one of the two fibers is cut.
  • Page 62 (reconfigurable optical add/drop multiplexing [ROADM] and optical line amplification [OLA] in the example) show the LOS (AOTS) alarm on Port 4 of the OSC-CSM (see Figure 1-23) and the LOS (OTS) on Port 5 of the OPT-BST (see Figure 1-24). Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-62 78-17742-02...
  • Page 63 Chapter 1 General Troubleshooting 1.12.1 Fiber Cut Detection Figure 1-23 LOS Indication on the ROADM Node OSC-CSM Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-63 78-17742-02...
  • Page 64 The LOS (OTS or AOTS) alarm is raised by the ROADM-RX node that was receiving the signal coming from the broken fiber. The final fault condition of the network is shown in Figure 1-25. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-64 78-17742-02...
  • Page 65 In node view (single-shelf mode) or shelf view (multishelf mode) (Figure 1-26 Figure 1-27), the alarm panel of the receiving node (ROADM in this example) reports the LOS (OTS), while the transmitting node (OLA) reports only an EOC alarm. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-65 78-17742-02...
  • Page 66 Chapter 1 General Troubleshooting 1.12.1 Fiber Cut Detection Figure 1-26 ONS 15454 SDH ROADM Node View with Fault Condition for ALS MODE Disabled Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-66 78-17742-02...
  • Page 67 Verify the alarm is valid, then perform the following steps for both DWDM nodes connected to the span Step 2 identified in Step Double-click the card directly connected to the span (either the OPT-BST or the OSC-CSM). Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-67 78-17742-02...
  • Page 68 Note If the “gray” condition of the span persists, log into the Technical Support website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447) to report a service-affecting problem. If the network ALS setting on the DWDM nodes that you are troubleshooting is Auto Restart, continue...
  • Page 69 The basic assumption is that the network ALS feature (for feature details, refer to the “Network Optical Safety––Automatic Laser Shutdown” section in the Cisco ONS 15454 DWDM Reference Manual) is active (ALS Mode = Auto Restart on the OPT-BST [+ OSCM] and OSC-CSM). Given this assumption,...
  • Page 70 Step If the gray color persists on the span, log into the Technical Support Website at Note http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447) in order to report a service-affecting problem. Step 2 Isolate the fiber affected by the excessive insertion loss. For the two fibers belonging to the span, identify the one for the W–E line direction.
  • Page 71 Insertion Loss value. If possible, try to recover the original value by making a better fiber splice. If this is not possible, use the new value (must be less than 5 dB higher than the previous value) and rerun Cisco MetroPlanner to revalidate the new condition.
  • Page 72 If the alarm is correctly reported, move to Step 3. If not, close the CTC application, delete the CTC cache, and open the CTC connection again. Then, go back to Step Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-72 78-17742-02...
  • Page 73 If the “gray condition” of the span persists, log into the Technical Support Website at Note http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem. Measure the new Span Loss value after fixing the fiber.
  • Page 74 Go back to the Cisco MetroPlanner tool and open the network design configuration file. Select Installation Mode to freeze the node layout and amplifier positioning.
  • Page 75 The rebuilding of circuits automatically triggers the APC check mechanism (for details, refer to the “Network Reference” chapter of the Cisco ONS 15454 DWDM Reference Manual). The APC check mechanism impacts the optical gain of the amplifiers (primarily the OPT-PRE card) and the VOA express attenuation for the optical add/drop multiplexing (OADM) cards.
  • Page 76 After the network completes the restart phase, go to the formerly alarmed card and verify that the APC-CORRECTION-SKIPPED condition has cleared and a new Gain Setpoint or VOA Attenuation Reference (compare with Step 8a) has been provisioned. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-76 78-17742-02...
  • Page 77 If the optical result indications (power, OSNR, CD, and so on) are all green, the repair procedure is complete. If not, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem.
  • Page 78 If the discrepancy persists, log into the Technical Support Website at Note http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem. Measure the new Span Loss value after the fiber is repaired.

  • Page 79: Ochnc Circuits Creation Failure

    Step 10 1.12.3 OCHNC Circuits Creation Failure OCHNC circuit creation is managed by the Cisco Wavelength Path Provisioning (WPP) network application. The WPP application helps prevent errors during new circuit activation (if the wavelength is already allocated in the path between source and destination) and also guarantees an appropriate time interval between one circuit activation and the next to enable proper amplifier gain regulation by APC.

  • Page 80: Conditions For Ochnc Circuit Creation Failure

    Figure 1-30. In the message, click Details to see the partial connections that WPP can set up. Start troubleshooting the problem in the first node that is unreachable along the path. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-80 78-17742-02...
  • Page 81 The circuit is successfully created and reported under the Circuits tab, the Status field turns to DISCOVERED, but the Circuit State is OOS (locked). The condition is shown in Figure 1-31. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-81 78-17742-02...
  • Page 82 One (or more) of the intranode connections between two DWDM cards associated with the circuit have not been properly created. Prerequisite condition 1.12.3.1 Prerequisites for Successful OCHNC Circuit Creation has not been met. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-82 78-17742-02...
  • Page 83 Restart after a Fiber Cut, page 1-69). If necessary, log into the Technical Support Website at http://www.cisco.com/techsupport Note for more information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem. If the OSC link is not down, continue with Step •...

  • Page 84: Node Level (Intranode) Problems

    If necessary, log into the Technical Support Website at http://www.cisco.com/techsupport for more Step 5 information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem. 1.13 Node Level (Intranode) Problems Troubleshooting for node-level optical channel (OCH) VOA start-up failure as well as internal VOA control loop problems in the 32DMX-C and 32DMX-L cards that occur due to counter-propagating light are discussed in this section.
  • Page 85 The Incoming Signal Validation phase checks to see that the optical interface connection is valid and that the optical power level is appropriate. Cisco MetroPlanner calculates the VOA Attenuation Reference value to allow only supported MSTP interfaces to overcome the power start-up (Pstart-up) acceptance level. (Refer to the “Network Reference”...

  • Page 86: Voa Failure Scenarios

    Chapter 1 General Troubleshooting 1.13.2 VOA Failure Scenarios The power setpoint is generated by Cisco MetroPlanner on a case-by-case basis. During the ANS run, Note the power target is provisioned on the VOA. 1.13.1.3 Phase 3: Channel Power Setpoint Locking In Phase 3, the VOA is kept in a transient standby condition when a steady power value close enough to the final power setpoint has been reached (nominally 3 dBm lower).
  • Page 87 CTC connection again. If the alarm inconsistency persists, log into the Technical Support Website at Note http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1...
  • Page 88 If the LOS-P alarm has not cleared, replace the 32WSS card (refer to the “Add and Remove Cards and Nodes” chapter of the Cisco ONS 15454 DWDM Procedure Guide). Before you replace the card, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem.
  • Page 89 The output power value must be within the expected range (refer to the “Hardware Specifications” • appendix in the Cisco ONS 15454 DWDM Reference Manual). If the trunk port PM is not available through CTC, perform a manual measurement using a standard power meter.
  • Page 90 6. Otherwise, take the appropriate corrective action, including card replacement if the output power value is outside of the expected range (refer to the “Add and Remove Cards and Nodes” chapter of the Cisco ONS 15454 DWDM Procedure Guide. Replacing the card should correct the problem.) High-performance devices on this card can get hot during operation.

  • Page 91: Scenario B: Optical Power Level Of The Incoming Signal Lower Than Expected

    If the LOS-P alarm has not cleared, replace the 32MUX-O card (refer to the “Add and Remove Cards and Nodes” chapter of the Cisco ONS 15454 DWDM Procedure Guide). Before you replace the card, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem).
  • Page 92 Power field, but the value is (VOA Power Ref – 6 dBm) < Power < VOA Power Ref (see Figure 1-35). To access this value, in card view, click the Provisioning > Parameters tabs. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-92 78-17742-02...

  • Page 93: Corrective Actions For Scenario B (Optical Power Level Of Incoming Signal Lower Than Expected)

    Click the Synchronize button at the bottom left of the window. If the alarm is correctly reported, move to Step 2. If not, close the CTC application, delete the CTC cache, and open the CTC connection again. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-93 78-17742-02...
  • Page 94 The output power value must be within the expected range (refer to the “Hardware Specifications” appendix in the Cisco ONS 15454 DWDM Reference Manual). If the trunk port PM is not available through CTC (for example, TXP_MR_2.5G), perform a manual measurement using a standard power meter.
  • Page 95 If the alarm condition persists even after the checking and fixing the fibers, replace the 32WSS card (refer to the “Add and Remove Cards and Nodes” chapter of the Cisco ONS 15454 DWDM Procedure Guide). Before replacing the card, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in...
  • Page 96 A patch-panel tray is normally used to manage fiber connections (for patch-panel cabling details, refer Note to the “Turn Up a Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide). Verify that the power value coming out of DROP_TX port of the coupled 32DMX-O card is correct: •...
  • Page 97 If the alarm condition persists even after the cabling is checked or fixed, replace the 32MUX-O card (refer to the “Add and Remove Cards and Nodes” chapter of the Cisco ONS 15454 DWDM Procedure Guide. Before replacing the card, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in...
  • Page 98 The output power value must be within the expected range (refer to the “Hardware Specifications” appendix in the Cisco ONS 15454 DWDM Reference Manual). If the trunk port PM is not available through CTC, perform a manual measurement using a standard power meter.

  • Page 99: Scenario C: Optical Drop Power Level Lower Than Expected

    Note could be related to a network issue and a more accurate analysis of the signal flow is needed according with the actual system topology. If necessary, call Cisco TAC (1 800 553-2447) for help. 1.13.2.3 Scenario C: Optical Drop Power Level Lower Than Expected This scenario describes the condition in which the optical power at the 32DMX-O drop channels is lower than expected.
  • Page 100 TXP or MXP card can lead to condition where only a single wavelength fails, such as the one (Channel 25) shown in Figure 1-37. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-100 78-17742-02...

  • Page 101: Corrective Action For Scenario C (Optical Power Level Of Incoming Signal Lower Than Expected)

    CTC connection again. If the alarm inconsistency persists, log into the Technical Support Website at Note http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in order to report a service-affecting problem. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1...
  • Page 102 The output power value must be within the expected range (refer to the “Hardware Specifications” appendix in the Cisco ONS 15454 DWDM Reference Manual). If the trunk port PM is not available through CTC (for example, TXP_MR_2.5G), perform a manual measurement using a standard power meter.
  • Page 103 If the alarm condition persists even after the cabling has been checked and fixed, replace the 32DMX-O card (refer to the “Add and Remove Cards and Nodes” chapter of the Cisco ONS 15454 DWDM Procedure Guide. Before replacing the card, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in...
  • Page 104 The output power value must be within the expected range (refer to the “Hardware Specifications” appendix in the Cisco ONS 15454 DWDM Reference Manual). If the trunk port PM is not available through CTC, perform a manual measurement using a standard power meter.

  • Page 105: Counter-Propagating Light Affecting Operation Of 32Dmx-C And 32Dmx-L Cards

    Cisco Spare depots. Once the new card is installed in field, a downgrade of the optical module will be prevented and the latest optical module version is preserved on the software package.
  • Page 106 7), and in case of a bad connection, you must shut off the TXP Trunk-TX port (Step 9b) as soon as possible. This is to minimize possible impairments on other channels that are already in service. Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1 1-106 78-17742-02...

Table of Contents