The YARC guide

A free web tool for network technicians: plan a rack, document the patching and get the exact cables to buy. No account, nothing to install, your racks stay on your own device.

Open YARC

Why I built YARC

I built YARC to solve a problem that cost me time and money on every job site: showing up with the wrong cables. Wrong lengths, wrong quantities, missing cable managers, and planning in spreadsheets and guesswork.

YARC fixes this. Plan the rack visually and get a precise packing list every time. And document what every port connects to, so the rack has a patching schedule a technician can actually use on site.

Every rack should have a living document. YARC is that document.

YARC does

Plan rack layouts before you order cables
Calculate exact cable lengths per port
Document every port: Connected, NC or N/A
Follow Planning → Inventory → Overview
Export a PDF patching schedule for your technician

YARC does not

Monitor a live network
Read real-time data from your switches
Replace a full DCIM platform
Store passwords or personal data: keep them out of your notes

Three steps

1. Planning — design the rack

Set the rack name and size, anything from 1U to 60U.
Click or drag patch panels, switches, cable managers and other devices into the rack. YARC stops two devices from sharing a U.
Pair a panel with a switch. A copper panel next to a switch, or with one cable manager between, pairs itself. Patch 1:1 patches every free port at once.
Fine-tune single ports, such as uplinks, in Precision Port Mapping.

2. Inventory — document the real rack on site

A simple list from the top U down, made for a phone in a dark server room.
Tap a device to patch a port, from either end.
Add name, height, port labels, serial number and asset tag, and mark each port Connected, NC or N/A.

3. Overview — check and export

Every cable with its length, measured through the cable managers and rounded up to a standard length you can order.
The picking list grouped by type, length and colour, as PDF, TXT or CSV.
A PDF report with the rack inventory and the patching schedule.
On site, Patch Buddy walks you through the patching one port at a time.

Want to look around first? On an empty rack in Planning, press Open Demo Rack. Every report is open while the demo is unchanged.

Free and Pro

Free

Everything you enter: layout, devices, patching, serial numbers, asset tags, notes, cable colours
Cable lengths on screen
Rack files and autosave
The first items of each report

YARC Pro · one-time 9€

Rack Inventory
Detailed Cable List
Site Summary for several racks
The complete PDF and the full picking list

Pro is a single payment, not a subscription. You get a license key and enter it under Activate License.

Questions

Do I need an account?

No. YARC runs in your browser. There is no login and no cloud storage.

Where is my rack saved?

In your browser on your own device. YARC saves as you work. Save Copy keeps a copy to go back to, and you can save the rack as a .yarc file to move it between phone and desktop or share it with a colleague.

How does YARC work out cable length?

It follows the way an installer routes the cable: from the height between the two ports (1U = 44.45 mm), through the cable managers and along the rack side, plus slack, rounded up to the next standard cable length. Without cable managers the cable hangs free and YARC adds extra slack. These settings can be changed under Advanced settings.

Which devices can I patch?

Any device with ports: fiber and copper patch panels, switches and SFP ports. Copper goes to copper or a copper SFP module, fiber to fiber or SFP; SFP to SFP can also be a DAC cable.

Does it work on a phone?

Yes. Planning works best on a larger screen. Inventory and patching are made for a phone on site.

Who makes YARC?

V34, in Sweden. Feedback is welcome by mail: yarc@v34.com.

Open YARC

Free to use. Nothing to install.