Cisco TVOICE 8.0: Troubleshooting RSVP Agents and Voice Quality Issues

Anyone wishing to obtain the Cisco Certified Network Professional CCNP Voice designation that validates the skills and knowledge required in order to create a voice solution that is transparent, scalable, and manageable.Established IT professionals with a working knowledge of converged voice and data networks, of MGCP, SIP, and H.323 as well as a working knowledge of their implementation on Cisco IOS gateways, and working knowledge of Cisco Unified Communications Manager, Cisco Unified Communications features and applications, and Cisco IOS voice gateways in single-site and multisite environments.Candidates who have completed the Cisco Certified Network Associate Voice (CCNA Voice) Certification, which is obtained by completing the Introducing Cisco Voice and Unified Communications Administration 640-461 (ICOMM) v8.0 exam.

Please contact us for information about prerequisites.

Expected Duration
120 minutes

Resource Reservation Protocol (RSVP) specifies a resource-reservation, transport-level protocol for reserving resources in IP networks. RSVP provides a method to achieve Call Admission Control (CAC) in addition to location-based CAC. Location-based CAC constitutes a point-to-point CAC mechanism that does not take into account topology changes or multitier topologies, whereas RSVP does consider these topologies. Many customers request a full-mesh network topology for their video conferencing and video telephony environments to match their existing topology. RSVP can manage complex topologies. Location-based CAC supports only hub-and-spoke or point-to-point topologies such as simple Multiprotocol Label Switching (MPLS) any-to-any topologies.
Cisco Unified Communications Manager uses an RSVP agent, a Cisco IOS Software-based RSVP proxy with a Skinny Client Control Protocol (SCCP) interface to support RSVP. Cisco Unified Communications Manager communicates with the RSVP agent through a set of SCCP messages. The RSVP agent registers with Cisco Unified Communications Manager as either a Media Termination Point (MTP) or a transcoder device.
This course reviews the CAC process that is based on RSVP – including RSVP agent implementation, it describes the characteristics of the three call legs and it outlines the major issues that are experienced with RSVP agents as well as the intercluster RSVP feature.

Isolating the source of voice quality issues is one of the most difficult problems that you can face when troubleshooting a Cisco Unified Communications system. Voice quality can be subjective, and data networks are not sensitive to the same impairments or limitations to which voice over data networks are sensitive. This course concludes with a concentration on maintaining the quality of the voice traffic that crosses the data network and focuses on how to troubleshoot voice quality issues.


Troubleshooting Issues with RSVP Agents

  • describe the characteristics of RSVP CAC operations
  • describe the RSVP agent registration issues and how to troubleshoot them
  • recognize the major RSVP CAC issues that can be experienced at the call setup process and describe how to troubleshoot them
  • recognize major issues that can be experienced when using the intercluster RSVP feature and describe how to troubleshoot the issues
  • Troubleshooting Voice Quality Issues

  • describe the problems that face converged enterprise networks
  • describe the voice quality issues from which a Cisco Unified Communications system can potentially suffer
  • describe how to define and create a voice traffic service policy
  • describe how to identify voice quality issues and the tools to use when troubleshooting VoIP quality problems
  • recognize the causes of Layer 2 switching issues
  • describe how to diagnose and troubleshoot the Layer 2 switch issues
  • describe how to diagnose and resolve gateway issues that can result in VoIP quality problems
  • describe how to resolve delayed voice, synthetic voice, jitter, and choppy voice issues in a given scenario
  • describe how to resolve echo, one-way audio, and phone load firmware voice issues in a given scenario




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