IT Certification and Career Paths

642-901 BSCI

Building Scalable Cisco Internetworks

Retired July 31, 2010
Exam Number:     642-901
Associated Certifications: CCNP, CCIP, CCDP
Duration: 90 minutes (50-60 questions)
Available Languages: English, Japanese
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Exam Tutorial: Review type of exam questions

Exam Description

The Building Scalable Cisco Internetworks (BSCI 642-901) is a qualifying exam for the Cisco Certified Network Professional CCNP, Cisco Certified Design Professional CCDP, and Cisco Certified Internetwork Professional CCIP certifications. The BSCI 642-901 exam will certify that the successful candidate has important knowledge and skills necessary to use advanced IP addressing and routing in implementing scalability for Cisco ISR routers connected to LANs and WANs. The exam covers topics on Advanced IP Addressing, Routing Principles, Multicast Routing, IPv6, Manipulating Routing Updates, Configuring basic BGP, Configuring EIGRP, OSPF, and IS-IS.

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. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.

Implement EIGRP operations.

  • Explain the functions and operations of EIGRP (e.g., DUAL).
  • Configure EIGRP routing. (e.g., Stub Routing, authentication, etc.)
  • Verify or troubleshoot EIGRP routing configurations.

Implement multiarea OSPF operations.

  • Explain the functions and operations of multiarea OSPF.
  • Configure multiarea OSPF routing. (e.g., Stub, NSSA, authentication, etc.)
  • Verify or troubleshoot multiarea OSPF routing configurations.

Describe integrated IS-IS.

  • Describe the features and benefits of integrated IS-IS.
  • Configure and verify integrated IS-IS.

Implement Cisco IOS routing features.

  • Describe, configure or verify route redistribution between IP routing IGPs. (e.g., route-maps, default routes, etc.)
  • Describe, configure or verify route filtering (i.e., distribute-lists and passive interfaces).
  • Describe and configure DHCP services (e.g., Server, Client, IP helper address, etc.).

Implement BGP for enterprise ISP connectivity

  • Describe the functions and operations of BGP.
  • Configure or verify BGP operation in a non-transit AS (e.g., authentication).
  • Configure BGP path selection. (i.e., Local Preference, AS Path, Weight or MED attributes).

Implement multicast forwarding.

  • Describe IP Multicast (e.g., Layer-3 to Layer-2 mapping, IGMP, etc.).
  • Describe, configure, or verify IP multicast routing (i.e., PIM Sparse-Dense Mode).

Implement IPv6.

  • Describe IPv6 addressing operations.
  • Describe IPv6 interoperation with IPv4.
  • Describe, configure or verify OSPF routing with IPv6 addressing.
Recommended Training

Building Scalable Cisco Internetworks (BSCI) is the recommended training for this exam.

Courses listed are offered by Cisco Learning Partners the authorized source for Cisco IT training delivered exclusively by Certified Cisco Instructors. For a list of Cisco Learning Partners, use the Learning Partner Locator.

Additional Resources

A variety of Cisco Press titles may be available for this exam. These titles can be purchased through the Cisco Marketplace Bookstore, directly from Cisco Press.


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