Troubleshooting Unified Communications (TUC) : 642-426 Exam
642-426 TUC
Troubleshooting Unified Communications
Exam Number: 642-426
Associated Certifications: CCVP
Duration: 90 minutes (54 questions)
Available Languages: English
Click Here to Register: Pearson VUE
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Exam Tutorial: Review type of exam questions
Exam Description Exam Topics Recommended Training Additional Resources
Exam Description
The 642-426 Troubleshooting Unified Communications (TUC) exam is the exam associated with the CCVP certification. Candidates can prepare for this exam by taking Troubleshooting Cisco Unified Communications (TUCv1.0) course. The exam will certify that the successful candidate has the knowledge and skills necessary to troubleshoot Enterprise CallManager, Unity, and IP network deployments. The exam addresses hands-on experience in configuring, deploying, and troubleshooting Unified Communications solutions. Topics covered include (see Claims and Components attached).
Exam Topics
The following topics are general guidelines for the content likely to be included on the Remote Access exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice.
Apply the Cisco recommended methodology used to determine general Unified communications system problems and issues
Describe the steps that can be used to identify a problem with a given unified communication system
Identify tools that can be used to identify and isolate problems
Correlate events (using traces, logs, and monitoring tools to identify the problem)
Parse and interpret trace logs and system logs
Troubleshoot call setup issues
Troubleshoot PSTN call setup issues
Troubleshoot intersite call setup issues
Troubleshoot intrasite call setup issues
Troubleshoot registration issues
Troubleshoot issues with endpoint registration
Troubleshoot issues with gateway registration
Troubleshoot issues with gatekeeper registration
Troubleshoot database issues
Troubleshoot database replication issues in CallManager 4.x
Troubleshoot database replication issues in CallManager 5.x
Troubleshoot 3rd party LDAP synchronization issues
Troubleshoot application issues
Troubleshoot voicemail integration
Troubleshoot CTI integration issues
Troubleshoot IP phone XML services
Troubleshoot media resources
Troubleshoot music on hold
Troubleshoot conference bridges
Troubleshoot transcoders
Troubleshoot MTP
Troubleshoot voice quality issues
Troubleshoot echo
Troubleshoot dropped calls
Troubleshoot audio quality issues
Troubleshoot security issues
Troubleshoot authentication issues
Troubleshoot certificate issues
Exam Number/Code: 642-426
Exam Name:Troubleshooting Unified Communications (TUC)
“Troubleshooting Unified Communications (TUC)”, also known as 642-426 exam, is a Cisco certification. With the complete collection of questions and answers, Actualtests has assembled to take you through 87 Q&As to your 642-426 Exam preparation. In the 642-426 exam resources, you will cover every field and category in Others helping to ready you for your successful Cisco Certification.
Free Demo DownloadActualtests offers free demo for 642-426 exam (Troubleshooting Unified Communications (TUC)). You can check out the interface, question quality and usability of our practice exams before you decide to buy it.
QUESTION 11
Network topology exhibit:
debug voice ccapit inout command output:
*** MISSING ***
Trace file output exhibit:
*** MISSING ***
Your work as a network engineer at Certkiller .com. Study the exhibits carefully.
You have configured a trunk between the CME at 10.3.130.1 and the Cisco Unified
CallManager cluster.
However, when you test you experience a problem. Calls from ext 4001 to ext 2001
receive a fast busy. Calls from ext 2001 to ext 4001 work fine.
What is causing the problem that prevents calls from ext 4001 to ext 2001 from
being prompted?
A. The trunk IP address in the Cisco Unified CallManager information field is incorrect
B. The h323-gateway voip bind srcaddr 10.3.130.1 command need to be added to
Certkiller Branch office.
C. An incorrect CSS has been applied to the gateway at Certkiller Main office
D. A translation rule has been applied that is keeping the call from being completed
E. The CSS has been omitted from the trunk configured to Certkiller branch office
Answer: B
QUESTION 12
Network topology exhibit:
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show gatekeeper endpoint command exhibit:
*** missing ***
Trunk configuration exhibit:
*** missing ***
Your work as a network engineer at Certkiller .com. Study the exhibits carefully.
You have configured the gatekeeper on the Certkiller 1 router in the Certkiller main
office zone. You have configured Certkiller 1 to support the three local zone Certkiller
main office, Certkiller York office, and Certkiller LA office.
You issue the command show gatekeeper endpoints. The Certkiller main office zone
is missing.
What CallManager action should take so that the it registers with the gatekeeper in
the Certkiller main office zone.
A. Configure a zone name on the CallManger Trunk
B. Restart the CallManager so it can register with the gatekeeper
C. Set the Terminal Type to terminal in the Gatekeeper Information field of the Trunk
configuration
D. Change the Device Name to the IP address of the gatekeeper in the CallManager
Trunk Configuration page
Answer: A
QUESTION 13
Network topology exhibit:
show gatekeeper endpoint command exhibit:
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*** missing ***
Your work as a network engineer at Certkiller .com. Study the exhibits carefully.
You have configured the gatekeeper on the Certkiller 1 router in the Certkiller main
office zone. You have configured Certkiller 1 to support the three local zone Certkiller
main office, Certkiller York office, and Certkiller LA office.
However, there is a configuration that you need to fix. CallManager and the
gateways in the Certkiller York office zone and in the Certkiller LA office zone are
registered in the Certkiller main office zone, however they should be registered
within their own zone.
What action should you take?
A. The IP address in the gateway command h323-gateway voip ID needs to be changed
to that of the individual gateways in both gateways
B. The gatekeeper needs to be stopped and restarted for the changes to take effect.
C. The gatekeeper can only support one zone and all registering endpoints are being
place correctly in the first configured zone.
D. The zone name in the gateway command h323-gateway voip IP needs to be changed
to the correct zone in both gateways
Answer: D
QUESTION 14
The operation of an existing network is severely degraded,
Assign the appropriate severity level as defined by the TAC Case Severity
Definition.
A. S2 upgraded to S1
B. S4 upgraded to S1
C. S1 downgraded to S2
D. S3 downgraded to S4
E. S3 upgraded to S2
Answer: E
Cisco IP Solution Center Documentation Guide, 3.2
TAC Case Priority Definitions
To ensure that all cases are reported in a standard format, Cisco has established case
priority definitions.
Priority 1 (P1)-Your network is “down” or there is a critical impact to your business
operations. You and Cisco will commit all necessary resources around the clock to
resolve the situation.
Priority 2 (P2)-Operation of an existing network is severely degraded, or significant
aspects of your business operation are negatively affected by inadequate performance of
Cisco products. You and Cisco will commit full-time resources during normal business
hours to resolve the situation.
Priority 3 (P3)-Operational performance of your network is impaired, but most business
operations remain functional. You and Cisco will commit resources during normal
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business hours to restore service to satisfactory levels.
Priority 4 (P4)-You require information or assistance
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0
QUESTION 15
DRAG DROP
Drag the Cisco recommended troubleshooting model step to its appropriate
location.
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Answer:
QUESTION 16
IP Phone A can make calls to some but not all phones. Phone A cannot call Phone B.
The following is the extended ping output from the router interface on the
CallManager subnet to the Phone B subnet.
ping 172.16.1.45
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.45, timeout is 2 seconds:.!.!
Success rate is 40 percent (2/5)
What does this output indicate?
A. CallManager has a good IP path to Phone B.
B. The IP path from CallManager to Phone B has a 20% packet loss problem.
C. The IP phone is turned off, but the switch port it connects to is accessible via IP.
D. Multiple equal cost paths exist from CallManager to Phone B, and one is currently
unusable.
Answer: D
From the PING result , we could deduce that there are multiple paths to phone B and one
of them are not down. This is also the reason why Phone A can’t ring phone B.
If the PING result is 100%, then the answer is A.
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QUESTION 17
What task should be completed before enabling CCM trace files in a CallManager
cluster?
A. Configure NTP on all CallManagers.
B. Configure XML Formatted Output for Trace Analysis.
C. Install the Trace Collection Tool Plugin.
D. Configure a share drive on the publisher to store the trace files.
Answer: A
QUESTION 18
Following is a partial configuration of an access layer switch:
mls qos map cos-dscp 0 8 12 16 28 32 40 46
mls qos
!
spanning-tree mode pvst
spanning-tree extend system-id
!
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
wrr-queue cos-map 1 6 7
wrr-queue cos-map 2 5
wrr-queue cos-map 3 2 3 4
wrr-queue cos-map 4 0 1
spanning-tree portfast
!
interface FastEthernet0/2
switchport access vlan 20
switchport trunk encapsulation dot1q
switchport mode dynamic desirable
switchport voice vlan 20
no ip address
mls qos trust device cisco-phone
mls qos trust cos
wrr-queue cos-map 1 6 7
wrr-queue cos-map 2 5
wrr-queue cos-map 3 2 3 4
wrr-queue cos-map 4 0 1
spanning-tree portfast
!
Voice bearer traffic is mapped to which queue in FastEthernet0/2?
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A. Queue 1
B. Queue 2
C. Queue 3
D. Queue 4
Answer: B
wrr-queue cos-map
Use the wrr-queue cos-map global configuration command to assign class of service (CoS) values to the
CoS priority queues. Use the no form of this command to return to the default settings.
wrr-queuecos-map quid cos1…cosn
nowrr-queue cos-map [queue-id [cos1 ... cosn]]
Command Modes Global configuration
Usage Guidelines CoS assigned at the ingress port is used to select a CoS priority at the egress port.
Examples This example shows how to map CoS values 0, 1, and 2 to CoS priority queue 1, value 3 to CoS
priority
queue 2, values 4 and 5 to CoS priority 3, and values 6 and 7 to CoS priority queue 4:
Switch(config)# wrr-queue cos-map 1 0 1 2
Switch(config)# wrr-queue cos-map 2 3
Switch(config)# wrr-queue cos-map 3 4 5
Switch(config)# wrr-queue cos-map 4 6 7
This example shows how to map CoS values 0, 1, 2, and 3 to CoS priority queue 2:
Switch(config)# wrr-queue cos-map 2 0 1 2 3
quidThe queue id of the CoS priority queue. The range is 1 to 4 where 1 is the lowest CoS priority queue.
cos1…cosn The CoS values that are mapped to the queue id.
CoS Value CoS Priority Queues
0, 1 1
2, 3 2
4, 5 3
6, 7 4
Release Modification
12.0(5.2)WC(1) This command was introduced.
12.1(12c)EA1 CoS values were added to the no form of this command.
http://www.cisco.com/application/pdf/en/us/guest/products/ps628/c2001/ccmigration_09186a00804760c6.pdf
QUESTION 19
Which unity troubleshooting tool would be used to diagnose problems with skinny
and MWI?
A. trace tool
B. configuration tool
C. diagnostic tool
D. maestro tool
Answer: C
Cisco Unity Troubleshooting Guide (With Lotus Domino), Release 4.0(1)
CiscoUnity Diagnostic Tool
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The CiscoUnity Diagnostic Tool allows creating and viewing of diagnostic log files to
troubleshoot problems. It replaces the diagnostic log functionality in Maestro Tools, and
allows the system administrator or TAC staff to selectively run diagnostic traces at two
levels:
1. Macro Traces-These are collections of component traces that help diagnose problems
such as message waiting indicator and system problems.
2. Micro Traces-These are the component traces. Each component has up to 32 trace
levels that can be individually selected.
The CiscoUnity Diagnostic Tool also allows the system administrator or TAC staff to
perform the following tasks:
1. Create new log files on demand. This makes troubleshooting problems easier. When a
problem can be reproduced reliably, the system administrator can close all existing log
files and create new log files prior to reproducing the problem. This eliminates many
unnecessary and unrelated items from the logs.
2. Configure log settings. The system administrator can adjust the maximum disk space
allowed for all diagnostic log files. (The default setting is 400 MB.) The Logging
Properties screen also allows the system administrator to disable all diagnostic output by
clearing the Diagnostic Output check box.
3. Gather standard logs. This option provides the ability to quickly gather all or selected
Microsoft Windows and CiscoUnity logs.
4. Disable all traces. This is a quick way to return diagnostic logs to their default settings
after troubleshooting efforts are complete.
5. View the Event log. The Event log files for either the local computer or another
computer can be viewed and exported.
6. Change the display language for Windows Event log messages that are generated by
Cisco Unity. This is a temporary change and is only in effect while the Cisco Unity
Diagnostic Tool is running.
QUESTION 20
The Event Viewer Application Log on the Cisco CallManager subscriber initially
showed device SEP000F223984410 unregistered with a Reason Code of 9. It is now
registered back to the Cisco CallManager subscriber.
What was the possible cause?
A. The IP Phone lost its keepalive after 90 seconds.
B. The Catalyst switch reset.
C. The device name was unknown.
D. The Cisco CallManager initiated a reset.
Answer: D
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