Cisco 642-661

The Cisco 642-661 Configuring BGP on Cisco Routers exam from Cisco certification is one of the exams needed for the Cisco Certified Internetwork Professional (CCIP) certification. This Cisco 642-661 Configuring BGP on Cisco Routers exam is a qualifying exam for the CCIP certification. This exam measures the students understanding of the theory of BGP, the ability to configure BGP on Cisco IOS routers, and the skills with troubleshooting on BGP. This exams requires that the candidate has a valid CCNA certification as a prerequisite to this exam.

Exam Details:

The Cisco 642-661 Configuring BGP on Cisco Routers exam has a difficulty rating of about 3 out of 5 and is thus a moderate exam. The Cisco 642-661 Configuring BGP on Cisco Routers exam consists of approximately 50-60 questions. You have 90 minutes to complete the Cisco 642-661 Configuring BGP on Cisco Routers exam. The questions comprises of fill-in-the-blank questions, multiple-choice single answer, multiple-choice multiple answer, and drag-and-drop and simulation-based questions. The 642-661 practice exams, 642-661 study guides and 642-661 exam notes encompass the key topics tested in the Cisco 642-661 Configuring BGP on Cisco Routers exam.

Registering for the Exam:

The registration at authorized VUE and Prometric test centers will cost $125 USD for the Cisco 642-661 Configuring BGP on Cisco Routers exam.

Key Topics:

The key topics for the Cisco Certified Internetwork Professional (CCIP) certification is that it measures the candidates understanding of the theory of BGP, the ability to configure BGP on Cisco IOS routers, and the skills with troubleshooting on BGP. The Cisco 642-661 Configuring BGP on Cisco Routers exam covers the Border Gateway Protocol (BGP), BGP Transit Autonomous Systems, Route Selection Using Policy Controls, Connectivity with BGP (Customer-to-Provider), Optimizing BGP Scalability and Scaling Service Provider Network

You should be able to identify and its limitations in the given scenarios. It is important that you are able to describe the concept of BGP neighbors and the neighbor session establishment procedures, given a BGP network scenario. You need to know how to configure BGP to influence route selection using AS-path filters and be able to use outbound route filtering to minimize the impact of BGP routing updates on router resources, given an operational BGP network. It is important that you know the BGP path attributes. You should be able to use the local preference attribute to influence route selection as well as using the AS-path prepending to influence the return path selected by the neighboring autonomous systems. You need to have knowledge of the Customer-to-Provider Connectivity with BGP as well as implementing customer connectivity using static routing, given a service provider network. You must have knowledge of the BGP Transit Autonomous System and be able to verify the proper operation and perform the steps necessary to correct basic IBGP configuration errors given a configured BGP transit network.

You should be able to list the steps to migrate an existing IBGP backbone to a backbone with route reflectors and describe the function and operation of route reflectors in a BGP environment. It is thus important that you are familiar with the Cisco IOS commands needed to configure route reflectors on a BGP backbone. You must also be able to configure BGP to limit the number of prefixes received from a neighbor, given a BGP network. It is imperative that you have the knowledge scale IGP and BGP in Service Provider Networks. You should be able to describe the function and operation of route reflectors in a BGP environment, the concept of hierarchical route reflectors and their requirements based upon established route reflector design rules. It is important that you are able to configure and verify proper route reflector to modify IBGP split-horizon rules given an existing IBGP network.

Preparing for the Exam:

642-661 study materials that you can use to prepare for the exam is available on the Internet. These range from the official Cisco Certification Training courses and official Cisco Self Study Training Guides from Cisco Press, to the Testking 642-661 practice exams and Testking 642-661 study guides. 642-661 braindumps are also available online.

Certification Credits: