Network Diagnostics and More
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Network Designer limitationsThe diagram documents an intended design; it does not validate or configure a live network.

Address, VLAN, link, capacity, resilience, security and vendor details are entered by the user and can be incomplete or wrong. Peer-review the exported design, validate it against current product documentation and test the implementation through an approved change process.

Important: Do not rely on this result alone for purchasing, configuration, security, safety, compliance, contractual or fault-diagnosis decisions. Results can be incomplete, delayed, misleading or wrong. Verify important findings with the relevant provider, manufacturer documentation and an appropriate independent test or qualified professional.

Plan a network

Network Designer

Design physical, logical, WAN, management and wireless networks with current and legacy vendor hardware. Plan ports, PoE, racks, cabling and estimated Wi-Fi coverage; compare models and validate capacity; then export the complete browser-local project.

Open and free to use. No account, subscription, upload or paid service is required. Auto-save and exports are created locally on this device.

Quick start

Build a diagram in six steps

Start with a verified vendor model or a generic infrastructure device. Everything remains editable and browser-local.

  1. ChooseAdd real hardware or a generic device.
  2. PositionDrag devices around the canvas.
  3. DocumentAdd hostnames, IPs, VLANs and notes.
  4. ConnectSelect a device, connection type and destination.
  5. ReviewResolve duplicate or isolated-device warnings.
  6. ExportDownload PDF, PNG, SVG, CSV or the editable project.
Open the complete Network Designer guide and worked example

Browser-local project

Project details

Auto-saved locally
Local project storageStorage estimate unavailableRecovery snapshotsCreated automatically while editing

Featured equipment library

Add pictured vendor hardware

Choose a featured firewall, switch or wireless access point, then drag it into place. The image source and verification status stay attached to the device.

Official rear-panel diagram of a Cisco Secure Firewall 1010
Cisco

Secure Firewall 1010

Firewall · Exact model diagram

Image verification

Official Cisco chassis diagram. Verify the physical port labels and operating mode before implementation.

Open model reference
Front product photograph of a Fortinet FortiGate 90G
Fortinet

FortiGate 90G

Firewall · Exact model image

Image verification

Model-specific photograph supplied through an authorised Fortinet reseller and linked to the Fortinet model reference.

Open model reference
Official front-panel diagram of a Palo Alto Networks PA-820
Palo Alto Networks

PA-820

Firewall · Exact model diagram

Image verification

Official PA-820 diagram. Confirm lifecycle status and the supported PAN-OS release before implementation.

Open model reference
Official product image of a Check Point Quantum 6400
Check Point

Quantum 6400

Firewall · Exact model image

Image verification

Official Quantum 6400 reference image. Installed expansion cards can change the available interfaces.

Open model reference
Official front product image of a SonicWall NSa 2800
SonicWall

NSa 2800

Firewall · Exact model image

Image verification

Official NSa 2800 image. Verify the selected hardware generation and port capabilities.

Open model reference
Official front product image of a Sophos XGS 2300
Sophos

XGS 2300

Firewall · Exact model image

Image verification

Official XGS 2300 image. Optional Flexi Port modules can change the installed interfaces.

Open model reference
Cisco Catalyst C9300L-24T-4G 24-port switch in a front three-quarter view
Cisco

Catalyst C9300L-24T-4G

Switch · Exact model image

Image verification

Exact C9300L-24T-4G chassis. The source SKU adds the Network Advantage licence suffix; licensing does not change the pictured chassis.

Open model reference
HPE Aruba Networking CX 6300M JL664A 24-port switch in a front three-quarter view
HPE Aruba Networking

CX 6300M JL664A

Switch · Exact model image

Image verification

Exact JL664A 24-port 1GbE model. Other CX 6300M 24-port variants have different media and PoE capabilities.

Open model reference
Juniper Networks EX4400-24T 24-port switch in a front three-quarter view
Juniper Networks

EX4400-24T

Switch · Exact model image

Image verification

Exact EX4400-24T image supplied through a Juniper-authorised distributor; verify the selected power and airflow options.

Open model reference
Fortinet FortiSwitch 124F-FPOE 24-port PoE switch in a front three-quarter view
Fortinet

FortiSwitch 124F-FPOE

Switch · Representative family image

Image verification

The exact FPOE product page supplies a 124F-family exterior image. Confirm the FPOE power budget and rear hardware from the ordered SKU.

Open model reference
Cisco Meraki MS130-24X 24-port cloud-managed switch in a front view
Cisco Meraki

MS130-24X

Switch · Exact model image

Image verification

Exact MS130-24X product-page image. Verify licensing, PoE requirements and uplink specification separately.

Open model reference
Ubiquiti UniFi Pro Max 24 PoE switch in a front three-quarter view with Etherlighting ports
Ubiquiti

UniFi Pro Max 24 PoE

Switch · Exact model image

Image verification

Exact manufacturer-hosted USW-Pro-Max-24-PoE image. Verify regional power input, PoE budget and optics before implementation.

Open model reference
Official SonicWall Switch family product image
SonicWall

SWS14 family

Switch · Representative family image

Image verification

Official SonicWall switch-family reference. Select the exact SWS model from the complete catalogue and verify its port and PoE specification.

Open model reference
Fortinet FortiAP 231G indoor wireless access point
Fortinet

FortiAP 231G

Access Point · Exact model image

Image verification

Exact FortiAP 231G product reference. Regional SKUs and antenna variants must be verified separately.

Open model reference
Cisco Catalyst 9166I wireless access point
Cisco

Catalyst 9166I

Access Point · Exact model image

Image verification

Official Cisco Catalyst 9166 Series reference. Confirm regulatory domain, antenna type and management mode.

Open model reference
Cisco Meraki MR46 cloud-managed wireless access point
Cisco Meraki

MR46

Access Point · Exact model image

Image verification

Official MR46 reference. Cloud licensing and regulatory-domain requirements must be verified separately.

Open model reference
HPE Aruba Networking AP-635 wireless access point
HPE Aruba Networking

AP-635

Access Point · Exact model image

Image verification

Exact AP-635 product reference. Verify regulatory domain, pack quantity and Aruba Central or controller requirements.

Open model reference
SonicWall SonicWave 641 secure wireless access point
SonicWall

SonicWave 641

Access Point · Exact model image

Image verification

Official SonicWave 600 Series reference. Verify PoE, country code and Wireless Network Manager support.

Open model reference

Current and legacy hardware

Complete model catalogue

Search individual firewall, switch and access-point models. A family image is shown when an exact archived product photograph is unavailable and is always labelled as representative.

737 selectable models
Representative Cisco Catalyst wireless access point photograph
Cisco · Access Point

Aironet 1040

Aironet

LegacyRepresentative family imageMixed sourcesChecked 3 October 2026

The catalogue selection is the Aironet 1040. The accompanying image represents the Aironet family and must not be used as an exact port map. Verify the ordered SKU, regulatory domain, modules and port specification.

1 planned ports · No PoE budget recorded · Not rack mounted

Open model or family reference

Showing 737 of 737 models. Catalogue entries are planning aids; verify exact regional SKU, lifecycle, licences, radios, PoE, modules and ports before purchase or deployment.

Logical network planning

VLAN register and port assignments

Document VLAN addressing, purpose and DHCP ranges, then assign access, trunk or hybrid behaviour to connected ports.

4 VLANs
10 Users20 Servers30 Guest99 Management
Editable VLAN register
IDNameSubnetGatewayDHCP scopePurposeColourAction

Device VLAN assignments

Enter one VLAN for an endpoint or a comma-separated list for multi-VLAN devices.

Validation

Checks cover VLAN ranges, duplicate IDs and subnets, undefined references and incompatible access-port assignments.

  • Internet references VLAN 0, which is not in the VLAN register.
  • Edge firewall references VLAN 0, which is not in the VLAN register.
  • WAN-01 references VLAN 0, which is not in the VLAN register.
  • CAB-02 references VLAN 0, which is not in the VLAN register.
  • CAB-02 has more than one VLAN assigned.
  • WLAN-01 references VLAN 0, which is not in the VLAN register.
  • WLAN-01 has more than one VLAN assigned.

These checks do not configure switches, routing, DHCP, spanning tree, security policies or vendor-specific trunk behaviour.

Connected port VLANs

Apply VLAN behaviour to each documented cable or logical connection.

ConnectionEndpointsModeUntagged / nativeTagged VLANs
WAN-01WANInternet · Provider
Edge firewall · WAN1
CAB-01EthernetEdge firewall · LAN1
Core switch · Gi1/0/1
CAB-02EthernetCore switch · Gi1/0/2
Application server · eth0
CAB-03PoECore switch · Gi1/0/3
Office Wi-Fi · eth0
WLAN-01WirelessOffice Wi-Fi · radio
User devices · Wi-Fi

Integrated planning studio

Design, validate and document

Templates, model comparison, wireless planning, rack elevation, cable scheduling and capacity checks all use the same browser-local project.

3 review items

Start from a template

Templates remain fully editable and are starting points only.

Compare models

Wireless floor plan

Add a PNG, JPEG or WebP floor plan smaller than 5 MB.

Planning comparison — verify specifications before purchase
PropertyCisco
Aironet 1040
Cisco
Aironet 1140
TypeAccess PointAccess Point
FamilyAironetAironet
LifecycleLegacyLegacy
Ports11
PoE budgetNone / verifyNone / verify
Uplinks11
Rack unitsNot rack mountedNot rack mounted
Wireless bands2.4 / 5 GHz (verify model)2.4 / 5 GHz (verify model)
Image statusRepresentative family imageRepresentative family image
Last checked3 October 20263 October 2026

Estimated wireless coverage

1 access point. Circles use the entered planning radius and do not model walls or interference.

Office Wi-Fi

Interactive rack builder

Main communications rack · choose a device then a free unit, or choose an available unit then a device.

3 rack devices
U42
U41
U40
U39
U38
U37
U36
U35
U34
U33
U32
U31
U30
U29
U28
U27
U26
U25
U24
U23
U22
U21
U20
U19
U18
U17
U16
U15
U14
U13
U12
U11
U10
U9
U8
U7
U6
U5
U4
U3
U2
U1

Cable and optics schedule

Assign physical endpoints, media, identifier and planned length to every connection.

IDFromPortToPortMediaLength
InternetEdge firewall
Edge firewallCore switch
Core switchApplication server
Core switchOffice Wi-Fi
Office Wi-FiUser devices

Capacity and compatibility checks

  • Core switch requires about 20 W PoE but its planning budget is 0 W.
  • Office Wi-Fi uses 2 links but has 1 planned ports.
  • Rack U1 is assigned to both Edge firewall and Core switch.

These are planning checks based on entered values and catalogue estimates, not vendor configuration validation.

Interactive canvasSelect a device to move or edit itTouch and hold a device, then drag. On desktop, you can also use the arrow keys.
Drag devices to reposition themThe yellow outline shows the selected device.
ISP circuitProvider ↔ WAN1LAN trunkLAN1 ↔ Gi1/0/1VLAN 20Gi1/0/2 ↔ eth0PoE trunkGi1/0/3 ↔ eth0Staff Wi-Firadio ↔ Wi-FiNETInternetInternetEdge firewallFortinet · fw-01Core switchCisco · core-sw-01SRVApplication serverapp-01APOffice Wi-Fiap-01PCUser devices10.10.10.0/24
Design minimap6 devices · 0 zones

Ready. Changes are saved in this browser.

Design command centre

Arrange, document and assure the complete design

Advanced controls use the same browser-local project. Open only the section you need.

3 review items
Selection and automatic layout

Select devices, then align, distribute, lock or save them as a reusable block.

Zones, sites and floors

Ports, paths and compatibility

Every connection can use a straight, curved or right-angle path. The offset acts as an editable routing waypoint.

ConnectionFrom portTo portPathWaypoint
Internet ↔ Edge firewallWAN · OS2 fibre
Edge firewall ↔ Core switchEthernet · Cat6A
Core switch ↔ Application serverEthernet · Cat6A
Core switch ↔ Office Wi-FiPoE · Cat6
Office Wi-Fi ↔ User devicesWireless · Wireless
Reusable groups and named versions

Validation and implementation pack
2 exact images0 representative images155 planned watts9.0 rack kg
  • HighCore switch needs approximately 20 W PoE, above its 0 W planning budget.
  • HighOffice Wi-Fi has 2 links but only 1 planned ports.
  • HighEdge firewall overlaps Core switch in the rack.

The ZIP contains the editable project, device inventory, port and cable schedule, VLAN register, image-assurance manifest, validation findings and implementation checklist.

Design checks

Review before implementation

6 devices · 5 links

No duplicate addresses, empty names or isolated devices detected.

These are structural checks only. They do not validate routing, switching, addressing, capacity, security or vendor configuration.

Export and continue later

Download the design

All exports are generated in this browser. The editable project preserves every device and connection.

Review before implementation or purchase
  • No duplicate-address, unnamed-device or isolated-device finding is currently shown.
  • Confirm exact SKUs, licences, modules, port capabilities, PoE, VLAN and routing behaviour against current manufacturer documentation.
  • Check exports for internal addresses, floor plans, cable labels and other sensitive operational information.
  • Use an approved implementation, validation and rollback plan. Planning estimates are not vendor configuration.