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To be edited ES-start Guidelines and book concept Since this is a community authored document, guidelines for contributors are listed in order to keep consistency thoughout the book. Such guidelines follow underlying ideas book concept about the book structure.

Such topics are best learned by labs. If possible, provide gns3 or Packet Tracer labs or at least problems to be solved with solutions. Also please update the TOC. This may help in case a discussion in the forum arises. Part The following topics are 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. ES-end 1. Here the focus is on Service Providers, therefore there should be more info about that, though the layered architecture is very similar. Sample Chapter is provided courtesy of Cisco Press.

Date: Apr 17, The Cisco hierarchical network model achieves this goal by dividing the network infrastructure into modular components. Each module is used to represent a functional service layer within the campus hierarchy. Page 7 of 32 Enterprise Campus Infrastructure Review The building blocks of the enterprise campus infrastructure are the access layer, the distribution layer, and the core layer.

The principal features associated with each layer are hierarchal design and modularity. A hierarchical design avoids the need for a fully meshed network in which all nodes are interconnected.

A modular design enables a component to be placed in service or taken out of service with little or no impact on the rest of the network. This methodology also facilitates troubleshooting, problem isolation, and network management. Access Layer The access layer is the point of entry into the network for end devices, as illustrated in Figure 1. With hardware, system-level redundancy can be provided using redundant supervisor engines and redundant power supplies.

It can also be provided by default gateway redundancy using dual connections from access switches to redundant distribution layer switches. StackWise technology enables switches to be interconnected to create a single logical unit through the use of special stack cables.

The cables create a bidirectional path that behaves as a switch fabric for all the interconnected switches. The stack is managed as a single unit, eliminating the need for spanning tree and streamlining the interface to a single management session for all devices.

For more information about StackWise, refer to Cisco. It supports the use of the QoS trust boundary. Distribution Layer The distribution layer aggregates traffic from all nodes and uplinks from the access layer and provides policy-based connectivity, as illustrated in Figure 1. Availability, load balancing, QoS, and provisioning are the important considerations at this layer. High availability is typically provided through dual paths from the distribution layer to the core and from the access layer to the distribution layer.

Layer 3 equal-cost load sharing allows both uplinks from the distribution to the core layer to be used. The distribution layer is the place where routing and packet manipulation are performed and can be a routing boundary between the access and core layers.

The distribution layer represents a redistribution point between routing domains or the demarcation between static and dynamic routing protocols. The distribution layer performs tasks such as controlled routing and filtering to implement policy-based connectivity and QoS. To further improve routing protocol performance, the distribution layer summarizes routes from the access layer.

For some networks, the distribution layer Page 9 of 32 offers a default route to access layer routers and runs dynamic routing protocols when communicating with core routers. The distribution layer uses a combination of Layer 2 and multilayer switching to segment workgroups and isolate network problems, preventing them from impacting the core layer.

The distribution layer may be used to terminate VLANs from access layer switches. The distribution layer connects network services to the access layer and implements QoS, security, traffic loading, and routing policies. Core Layer The core layer provides scalability, high availability, and fast convergence to the network, as illustrated in Figure The core layer is the backbone for campus connectivity, and is the aggregation point for the other layers and modules in the Cisco Enterprise Campus Architecture.

The core provides a high level of redundancy and can adapt to changes quickly. Core devices are most reliable when they can accommodate failures by rerouting traffic and can respond quickly to changes in the network topology. The core devices implement scalable protocols and technologies, alternate paths, and load balancing.

The core layer helps in scalability during future growth. Figure 1. For fast convergence around a link or node failure, the core uses redundant point-to-point Layer 3 interconnections because this design yields the fastest and most deterministic convergence results.

Page 10 of 32 The core layer is designed to avoid any packet manipulation, such as checking access lists and filtering, which would slow down the switching of packets. Not all campus implementations require a campus core. The core and distribution layer functions can be combined at the distribution layer for a smaller campus. Without a core layer, the distribution layer switches need to be fully meshed, as illustrated in Figure 1.

This design can be difficult to scale, and increases the cabling requirements, because each new building distribution switch needs full-mesh connectivity to all the distribution switches. The routing complexity of a full-mesh design increases as new neighbors are added. NOTE Note that combining distribution and core layer functionality collapsed core requires a great deal of port density on the distribution layer switches.

This scenario requires only two ports per distribution layer switch—regardless of the number of buildings switch blocks —and so you can avoid the expense of multilayer core switches. Page 11 of 32 In Figure 1. A third distribution module to support the third building would require 8 additional links to support connections to all the distribution switches, or a total of 12 links. A fourth module supporting the fourth building would require 12 new links, for a total of 24 links between the distribution switches.

As a recommended practice, deploy a dedicated campus core layer to connect three or more buildings in the enterprise campus, or four or more pairs of building distribution switches in a very large campus. The formulation would include, in my view, quite complex questions but I hope the exam scope requires a very basic knowledge.

Maybe some knowledge of cisco product portfolio, limited to routing and switching products, my be useful. The latest cisco quick product guide is dated , though. ES-end Page 12 of 32 1. Icons used in the books included in bibiography are of course summarized in their first pages. They may cover more than actually required for this exam, e.

Labs are of course useful to get hand-on experience. ES-end Page 13 of 32 1. ES-end 2. More lenghtly description is in [1] chap. In [2] the summarization is described within the chapters dedicated to the relevant routing protocol. ES-end 3. To be clarified: is MST in scope and, if yes, what is required? The STP configuration guide for release 8.

Practice is of course very helpful. ES-end Page 15 of 32 3. Both are covered in [1] chap. Chapter 2 includes configuration. ES-end 4. Further paragraphs should be out of scope of this topic. Therefore I would suggest just to read [3]. EIGRPv6 is covered in [2] chap 18 and in [3] chap 19 in the relevant paragraph.

Also in this case I would just read [3]. Since route redistribution is a topic only to be described 4. Route filtering should be also out of scope. I am not sure if Stuck in Active and Stub configuration are in scope. All are described in [3]. ES-end Page 17 of 32 5. ES-end 5. DHCPv4 for IOS-XR is strangely not included in [3], but is covered in the cisco documentation in the service configuration guide or more compact in this document.

ICMPv4 messages have a type number, each type could be further differentiated in codes. If a type is not structured in codes, then the code field gets a 0 value.

ES-end 6. Altough it maybe too detailed for the exam, it gives a good description of the underlying concepts. IOS XR installation could should? All details are in [5] chap 3. Licensing could should? The latter addresses also enhanced CLI functionality like aliases chap 8 and wildcards chap 9.


Cisco CCNA SP Certification Exams Training Materials

To be edited ES-start Guidelines and book concept Since this is a community authored document, guidelines for contributors are listed in order to keep consistency thoughout the book. Such guidelines follow underlying ideas book concept about the book structure. Such topics are best learned by labs. If possible, provide gns3 or Packet Tracer labs or at least problems to be solved with solutions.


CCNA Certification Community

These topics pollute our industry and devalue the hard work of others. Our technology workbooks practically explain all the concepts with the help of real-life case-study based labs. Buy for others I have always liked the labs gns3vault. Amazon Second Chance Pass it on, trade it in, give it a second life.


Cisco CCNA SP Certification Study Guides



CCNA SP Certification


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