What is Network Documentation

Network documentation is essential, providing valuable information and help for network failure. For example, there isn’t much to document in a small network of one or two switches and a firewall, and it is enough to put everything in a single diagram.

However, the network administrators must follow the general principle of a more extensive network. So, the actual documents you need will vary depending on the network. When designing a new network or mapping an existing network, document the network on the following point minimum.

Create a network documentation policy.

A network documentation policy is critical, as it describes what aspects of a network need to be documented.

Create network documentation for topology.

Create a topology that provides a visual reference that indicates the physical connectivity and logical Layer 3 addressing. This topology diagram should include all segments of the network, the routers connecting the various segments, and the servers, gateways and other major pieces of networking hardware. For larger, the administrator can create a block diagram of each segment map and then make a detailed diagram of each individual segment.

Document server names, roles, and IP addresses

The information included in a topology diagram is not enough for specific functions; there is more information that a network administrator needs to do their jobs effectively. So for each server, document the role of the server, IP address, and name. It is possible that a server has multiple IP addresses or multiple NICs, so it is also important to document that information.

Create a log file for each server.

The log file is an important document for any network device and server. When a server and network devices fail to serve, network administrators and engineers trace the failure by looking for recent changes.

The log file maintains and monitors recent changes in the network, such as patch and application installations and modified security settings. It helps troubleshoot problems and can also re-rebuild the server in the event of a failure.

Software versions, proof of licenses and hardware components

The applications, their versions running on each server, and their license must be documented. The receipt of the software is also essential in the network documentation, just in case your customer becomes involved in a software audit. The hardware documents should include the device connected to the network, configuration, backup, firmware revision and the password record.

Document the Active Directory

Documenting all active directories is impossible, but the active directory must be part of network documentation at some critical points.

• The domain names in the forest.
• The structure of the Active Directory.
• The location and contents of each group policy.

Backup procedures

The backup procedure is essential to write and document because it is the best defence against failure. The backup software used and its version must be documented. A description and backup type are also required to be reported.

Label everything

Labelling is an important part of network documentation and networking. It is important to label each server, device, and cable. This will make it easy to recognize the different pieces of hardware listed in your network document.