12 Network Diagram Templates [Free & Customizable]

Network diagrams shouldn't look like they were drawn by five different people using five different languages. Yet that's exactly what happens in most IT environments. 

One engineer uses circles for routers while another uses rectangles. VLANs get represented with dashed lines in one diagram and colored backgrounds in another. When you need to troubleshoot an outage or plan an upgrade, you waste precious time just trying to decode what you're looking at.

Beyond the confusion, there's the time sink. Building each diagram from scratch (e.g. manually placing shapes, fighting with alignment, configuring layers) burns hours and introduces errors that could derail future troubleshooting. Between managing daily operations and keeping services running, proper diagram templates always fall to the bottom of the priority list.

The templates below solve both problems, covering the most common enterprise network scenarios:

• WAN topologies including hub-and-spoke, traditional WAN, SD-WAN gateway configurations, and hybrid gateway setups

• Modern security architectures like SASE and DMZ designs

• Cloud connectivity with AWS Direct Connect and Azure ExpressRoute (simple, complex, and connectivity model variants)

• Campus LAN layouts and failover configurations including POTS in a Box setups

Each template includes pre-configured connector styles and ready-to-use layouts so your entire team speaks the same visual language and can map topologies in minutes instead of hours.

Later in this article, we'll also show you the easiest way to automate your telecom inventory management and establish a digital system of record for all your network services.

Downloadable Network Inventory Templates

We’ve put together a bundle of network inventory templates that you can download and customize for your unique setups.

Click here to download

It contains diagram templates for the following network architectures:

1. Hub and Spoke Network Topology

2. WAN

3. SD-WAN (Gateway)

4. SD-WAN (Hybrid Gateway)

5. SASE Architecture

6. Campus LAN

7. DMZ

8. AWS Direct Connect

9. MS Azure ExpressRoute (Simple)

10. MS Azure ExpressRoute (Complex)

11. MS Azure ExpressRoute (Connectivity Models)

12. POTS in a Box Failover

A Better Way to Track and Manage Your Networks

While network diagrams can help you keep things organized, they're only one piece of the puzzle. Static diagrams can quickly become outdated as your infrastructure evolves, and they don't help you track the critical service details that keep your telecom operations running smoothly - like contract terms, account information, service configurations, or renewal dates.

This is where Lightyear can help.

Lightyear helps you automate your telecom lifecycle with data-driven software, driving savings across procurement, inventory management, and bill payment.

Trusted by hundreds of enterprises, Lightyear:

• Digitizes your system of record: Lightyear will organize an accurate digital record of every network service, vendor, and cost in your footprint, providing you fingertip access to 30+ data points per service and custom visualizations of your network.

• Automates contract renewals and rebids: Gain transparency into contract details such as end dates, notice periods, and price escalations, with continuous cost optimization driven by automated re-bidding prior to any contract expirations. With Lightyear, you leverage over 1,000 vendor integrations and the industry’s most current and robust dataset to receive the most exhaustive set of bids at the best prices every single time.

• Streamlines service workflows: Open MACD, billing issue, and SLA breach tickets across all vendors behind a single pane of glass and let Lightyear handle the rest. Create custom reports to analyze costs, services, locations, vendors, and much more in just a few clicks.

• Achieve continuous ROI: Fulsome network visibility, automated rebids, annual telecom expense audits, and streamlined issue resolution will help you optimize network costs continuously (well in excess of industry deflation) and save a majority of the time you’d spend on tedious networking workflows.

• Eliminate the headache of tracking and paying invoices: Consolidate telecom invoices into a single monthly bill to simplify work for your IT / finance teams, avoid service disruptions, and audit ISP billing.

Learn more about Lightyear here.