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| 1.2 |  | Network Configuration Documentation |
| 1.2.2 |  | Identifying the components of a network configuration table |

A network configuration table contains accurate, up-to-date records of the hardware and software used in a network. The network configuration table should provide the troubleshooter with all the information necessary to identify and correct the network fault.

When a network configuration table is created for troubleshooting, the contents will vary depending upon the type of device that is documented. A minimum amount of data should be included for all components:

- The type of device, model designation
- The device network hostname
- The location of the device (building, floor, room, rack, panel)
- If it is a modular device, include all the module types and in which module slot they are located
- Data link layer addresses
- Network layer addresses
- Any additional important information about physical aspects of the device

Due to the complex nature of most networks, there is a great deal of information that could be recorded. For simplicity and efficiency, network configuration tables should group information based on the layers of the OSI networking model.

Network documentation will vary depending on the purpose of the documentation and the types of devices that are being documented. A configuration table constructed for budgetary purposes might include serial number, date of purchase, cost, vendor, and warranty expiration date. These items would not benefit a troubleshooter and should be maintained in separate tables.

Configuration table contents will also vary depending on the features implemented on the devices. The Router ID is an important piece of information to record about a router running OSPF. However, the Router ID would not be recorded if only EIGRP was running.

Figure displays an example of a network configuration table for a router. Figure documents an example of a network configuration table for a switch.