Foundation Summary

The "Foundation Summary" section of each chapter lists the most important facts from that chapter. Although this section does not list every fact from the chapter that will be on your CCNP exam, a well-prepared CCNP candidate should at a minimum know all the details in each "Foundation Summary" before taking the exam.

A network baseline documentation has two components:

■ Network configuration documentation

■ End system (network) configuration documentation

A network configuration table must document the following about each networking device:

■ Data link layer addresses and implemented features

■ Network layer addresses and implemented features

■ Important information about the physical aspects of the device

■ Other information that someone who is familiar with the network or who has experience troubleshooting it considers important to document

A network topology diagram is a graphical representation of the network that must illustrate all the devices and how they are connected. It should reveal the following physical, data link, and network layer information:

— Interface name

You need to gather and record some significant network configuration information about routers and switches. This information, along with the commands used to gather them, is outlined in Tables 1-8 and 1-9.

Table 1-8 Discovering Network Configurations on Routers and Multilayer Switches

Information Sought

Command Used to Gather That Information

Name of the device Model of the device Operating system version

show version

MAC address of the interface(s)

show interfaces show interfaces interface-type number

Active interfaces and their address

show ip interfaces

Summary of the interfaces along with their IP address, interface name, media type, and physical and data link operational status

show ip interfaces brief

Summary of the active IP routing protocols

show ip protocols

Details about the spanning tree

show spanning-tree summary show spanning-tree vlan vlan-number

List of the Cisco devices that are directly connected to this device

show cdp neighbors [detail] show cdp entry device-id

Details about any device that is connected to this device

show ip ospf neighbors show ip eigrp neighbors

Foundation Summary 23

Table 1-9 Discovering Network Configurations on Standard Switches

Information Sought

Command Used to Gather That Information

Name and model of the device Operating system version

show version

Active ports and their addresses

show interfaces description

Summary of the ports, including port names, port status, duplex, and speed

show interfaces status

Summary of the EtherChannel configuration

show etherchannel summary

Summary of the trunk status

show interfaces trunk

Details about the spanning tree

show spanning-tree show spantree

List of the Cisco devices that are directly connected to this device

show cdp neighbors

Details about any device that is connected to this device

show cdp entry device-id

The following enlists the 5-step process of creating network documentation:

■ Stage 2: Interface Discovery—Discover all the necessary information for the network documentation table.

■ Stage 3: Document—Record the discovered information into the network documentation table and determine whether you need to record any of it in the network topology diagram as well.

■ Stage 4: Diagram—Update the network topology diagram with the information that you determined must be transferred to the network topology diagram.

■ Stage 5: Device Discovery—Determine whether the device has a neighbor that has not yet been discovered and documented. If no devices remain to be documented, the documentation concludes; otherwise, proceed to Step 1.

The guidelines for creating network documentation are as follows:

■ Determine the scope.

■ Know your objective.

■ Keep the documents accessible.

■ Maintain the documentation.

Q&A

As mentioned in the introduction, you have two choices for review questions. The questions that follow give you a bigger challenge than the exam because they use an open-ended question format. By reviewing now with this more difficult question format, you can exercise your memory better and prove your conceptual and factual knowledge of this chapter. You can find the answers to these questions in Appendix A.

For more practice with exam-like question formats, including questions that use a router simulator and multiple choice format, use the exam engine on the CD.

1. What are the two components of network baseline documentation?

2. Name at least three pieces of information that a network configuration table must document.

3. The network topology diagram is a graphical representation of the network that must illustrate all the devices and how they are connected. Name at least three pieces of information that reveal physical, data link, or network layer information about a device.

4. List at least three commands that are useful for discovering network configurations on routers and multilayer switches.

5. List at least three commands that are useful for discovering network configurations on standard switches.

6. List the five stages of the process of creating network documentation.

7. What are the rules/guidelines for creating network documentation?

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