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The CCIP (Cisco Certified Internetwork Professional) provides individuals working in service provider organizations with competencies in infrastructure IP networking solutions. CCIP professionals have detailed understanding of networking technologies in the service provider arena including IP routing, IP QoS, BGP, and MPLS.

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(CCIP) Cisco Certified Internetwork Professional

Exam Number:     642-642

Associated Certifications: CCIP, IP Telephony Design Specialist, IP Telephony Express Specialist, IP Telephony Operations Specialist, and IP Telephony Support Specialist

Duration: 90 minutes (45-55 questions)

Available Language: English

Click Here to Register: Pearson VUE or Prometric

Exam Description

The QOS exam is one of the qualifying exams for the Cisco Certified Internetwork Professional, Cisco IP Telephony Design Specialist, Cisco IP Telephony Express Specialist, Cisco IP Telephony Operations Specialist, and Cisco IP Telephony Support Specialist certifications. The QOS 642-642 exam will test materials covered under the Implementing Cisco Quality of Service QOS v2.0 course. The exam will certify that the successful candidate has knowledge and skills necessary to configure and troubleshoot Cisco IOS routers running Quality of Service protocols in Service Provider and Enterprise environments. The exam covers topics on IP QOS, classification and marking Mechanisms, queuing mechanisms, traffic shaping and policing mechanisms, congestion avoidance mechanisms, link efficiency mechanisms, modular QOS command line interface, and QOS Best Practices.

Exam Topics

The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam.

Given a description of a converged network, identify problems that could lead to poor quality of service and explain how the problems might be resolved

Define the term Quality of Service (QoS) and identify and explain the key steps to implementing QoS on a converged network

List and explain the models for providing Quality of Service on a network

Explain the purpose and function of the DiffServ model

Describe the basic format of and explain the purpose of the DSCP field in the IP header

Define and explain the different per hop behaviors used in DSCP

Explain the interoperability between DSCP-based and IP-precedence-based devices in a network

Given a list of QoS actions, correctly match the QoS actions to mechanisms for implementing QoS and identify where in a network the different QoS mechanisms are commonly used

Given a network requiring QoS, explain how to implement a QoS policy using MQC

Explain how AutoQoS is used to implement QoS policy

Explain how link layer and network layer markings are used to define service classes and the different applications represented by each of these service classes

Given a network and a description of QoS issues, use MQC CLI commands to classify packets

Given a network and a description of QoS issues, use class-based marking to assign packets to a specific service class

Describe the function of Network Based Application Recognition

Describe the purpose of pre-classification to support QoS in various VPN (IPSEC, GRE, L2TP) configurations

Describe QoS trust boundaries and their significance in LAN based classification and marking

Identify the different classification and marking options available on Cisco L2 and L3 switching platforms

List and explain the different queuing algorithms

Explain the components of hardware and software queuing systems on Cisco routers and how they are effected by tuning and congestion

Describe the benefits and drawbacks of using WFQ to implement QoS

Explain the purpose and features of Class-Based WFQ (CBWFQ)

Explain the purpose and features of Low Latency Queuing (LLQ)

Identify the Cisco IOS commands required to configure and monitor LLQ on a Cisco router

Describe and explain the different queuing capabilities available on the Cisco Catalyst 2950 Switch

Describe the drawbacks tail drop as a congestion control mechanism

Describe the elements of a RED traffic profile

Describe Weighted Random Early Detection and how it can be used to prevent congestion

Identify the Cisco IOS commands required to configure and monitor DSCP-based CB-WRED

Explain how ECN interacts with WRED in Cisco IOS

Describe the purpose of traffic conditioning using traffic policing and traffic shaping and differentiate between the features of each

Explain how network devices measure traffic rates using single rate or dual rate, single or dual token bucket mathematical models

Identify the Cisco IOS commands required to configure and monitor single rate and dual rate CB-Policing

Identify the Cisco IOS commands required to configure and monitor percentage based CB-Policing

Explain how the two rate limits, average rate and peak rate, can be used to rate limit traffic

Identify the Cisco IOS commands required to configure and monitor CB-Shaping

Identify the Cisco IOS commands required to configure and monitor Frame Relay adaptive CB-Shaping on Frame Relay interfaces

Explain the various link efficiency mechanisms and their function

Identify the Cisco IOS commands required to configure and monitor CB header compression

Given a list of link speeds and a specific delay requirement, determine the proper fragment size to use at each link speed and identify the typical delay requirement for VoIP packets

Identify the Cisco IOS commands required to configure and monitor Multilink PPP with Interleaving

Identify the Cisco IOS commands required to configure and monitor FRF.12

Explain the QoS requirements of the different application types

List typical enterprise traffic classes then identify the delay, jitter, packet loss and bandwidth requirements of each traffic class

Explain the best practice QoS implementations and configurations within the campus LAN

Explain the best practice QoS implementations and configurations on the WAN customer edge (CE) and provider edge (PE) routers

Recommended Training

Implementing Cisco Quality of Service (QOS) is the recommended training for this exam.

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Exam Number:     642-661

Associated Certifications: CCIP

Duration: 90 minutes (50-60 questions)

Available Language: English

Click Here to Register: Pearson VUE or Prometric

Exam Description

Exam Topics

Given a network scenario, identify appropriate BGP usage and its limitations

Given a typical BGP network scenario, describe the concept of BGP neighbors and the neighbor session establishment procedures

Given a diagram of an operational BGP network, describe interdomain route processing, route propagation and BGP path selection

Given a network consisting of multiple domains, successfully configure BGP

Given a configured BGP network, verify proper operation and perform the steps necessary to correct basic BGP configuration errors

Given a customer scenario where connections to multiple ISPs must be supported, describe the need for influencing BGP route selection

Given a customer scenario where connections to multiple ISPs must be supported, successfully configure BGP to influence route selection using AS path filters

Given a customer scenario where connections to multiple ISPs must be supported, successfully configure BGP to influence route selection using prefix-list filters

Given an operational BGP network, use outbound route filtering to minimize the impact of BGP routing updates on router resources

Given a typical BGP network, correctly configure BGP to influence route selection using route maps

Given a typical BGP network, configure the route-refresh feature to minimize the impact of expediting BGP policy updates

List BGP path attributes and functionality of each attribute Influencing BGP Route Selection with Weights

Given a customer scenario where multiple connections must be supported, successfully configure BGP to influence route selection using the weight attribute

Given a customer scenario where multiple connections must be supported, successfully configure BGP to influence route selection using the local preference attribute

Given a customer scenario where multiple connections must be supported, successfully configure BGP to influence route selection using the Multi-Exit-Discriminator (MED) attribute

Given a customer scenario where multiple connections must be supported, successfully configure BGP to influence route selection using BGP community attributes

Describe the requirements to connect customer networks to the Internet in a service provider environment

Given a service provider network, implement customer connectivity using static routing

Given a customer scenario where multiple connections to a single ISP must be supported, implement customer connectivity with BGP

Given a customer scenario where connections to multiple ISPs must be supported, implement customer connectivity with BGP

Describe the function of a transit autonomous system and the need for IBGP IBGP and EBGP Interaction in a Transit AS

Given a transit autonomous system, describe the interaction between EBGP and IBGP in relation to relevant BGP attributes

Describe the function of an IGP in forwarding packets through an autonomous system

Given a BGP network scenario, successfully configure an autonomous system to act as a transit backbone

Given a configured BGP transit network, verify proper operation and perform the steps necessary to correct basic IBGP configuration errors

Describe the function and operation of route reflectors in a BGP environment

Based upon established route reflector design rules, describe the concept of hierarchial route reflectors and their requirements

Given an existing IBGP network, configure and verify proper operation of route reflectors to modify IBGGP split-horizon rules

Given a typical BGP network, successfully configure BGP to limit the number of prefixes received from a neighbor

Given a typical service provider network with connections to multiple autonomous systems, use AS-Path prepending to influence the return path selected by the neighboring autonomous systems

Given a typical BGP network, use BGP peer groups to share common configuration parameters between multiple BGP peers

Given a properly configured BGP network, use route flap dampening to minimize the impact of unstable routes

Describe common routing concerns of service provider networks

Describe the scalability issues of using OSPF and IS-IS as interior gateway protocols in a service provider network and list solutions for each

Describe common scalability issues when using BGP in a service provider network and list solutions for each

Recommended Training

Building Scalable Networks (BGP) is the recommended training for this exam.