Topology documentation is used to validate design guidelines and to aid future design,
change, and troubleshooting. Topology documentation should include both logical and
physical documentation for the following components:
?– Connectivity
?– Addressing
?– Media types
?– Devices
?– Rack layouts
?– Card assignments
?– Cable routing
?– Cable identi?¬?cation
?– Termination points
?– Power information
?– Circuit identi?¬?cation information
Figure 6-4 shows an example of the information that can be gathered using CDP.
Figure 6-4 Documentation Using CDP
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Managing Cisco Router Startup and Configuration 433
Maintaining accurate network topology documentation is the key to successful
con?¬?guration management. To create an environment where topology documentation
maintenance can occur, the information must be available for updates. Cisco strongly
recommends updating topology documentation whenever a network change occurs.
Summary of Discovering Neighbors on the Network
The following list summarizes the key points that were discussed in the previous sections:
?– The CDP is an information-gathering tool used by network administrators to get
information about directly connected devices.
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