I’ve been asked why I don’t just use Cat6 cable in my network upgrade. Here is why:
Thirty years ago, I still had dialup Internet. My first internet was a 9.6 kbps connection around 1992 or so. I remember thinking how fast my 56 kbps connection was when I got that just a few years later. I’m sure you all remember it taking hours to download a single picture. Then Time Warner started offering their “Road Runner” high speed broadband service in 1999, boasting speeds of up to 1.5 Mbps. Now here we are, 26 years later, and I have available Internet speeds of up to 1.2 gbps, nearly 22 THOUSAND times faster than it was just 30 years ago. Now word comes that we are about to get fiber Internet within the next year, and they are offering speeds of up 8 Gbps.
When I was a kid, my Dad, who you may remember was an engineer for Hewlett Packard, told me that no one needed a hard drive larger than 10mb. Why, he told me, 10mb could hold the text of every book within the Library of Congress. The computer (the HP computer he brought home was an early DOS machine built into a suitcase) had all the storage anyone could need, he predicted.
He was wrong. A corollary to Moore’s law, Internet speeds have historically doubled about every 2 years or so. With that in mind, I set out to build a home network that would anticipate these advances. Sure, I have 1GB speed now, but in a year it will likely be 2 GB. Within a decade, I would be looking at 32 or even more Gbps.
The network traffic between devices in a home can be even higher than that. In 2015, 1 Gbps was the usual home switch speed. Today, 1 Gbps remains the mainstream baseline, with 2.5 Gbps becoming a common upgrade. Sure, my computer may only be capable of 1 gbps, but what happens when there are multiple computers, streaming televisions, and IoT devices? All that traffic adds up, and you can soon overload a network.
The maximum speed we will ever get out of Cat 6 is 10gb. A couple of years, and a home wired with CAT6 will be obsolete. I’m not getting any younger, and I wanted to have a system that wouldn’t require a ton of work when I eventually get too old to climb up in the attic.
So with that in mind, I designed my home network. There were some initial observations:
- Internet enters my home via coaxial RG-6 cable.
- It travels through the walls and attic to the utility room, where the modem is located
- The modem has a maximum of 1 gbps
- from that utility room, there are 5 CAT6 cables that travel to various parts of the house
- My old system was a WiFi mesh and wasn’t capable of speeds I wanted
I noticed that I was paying for gigabit Internet, but speed testing showed I was only getting 300mbps or so, sometimes less. I plugged my computer directly into the modem, and was getting over 800 mbps. My network was the bottleneck. I was also having Internet connection issues. At first, I was just trying to clean up my WiFi, then I decided to redesign the entire network. I envisioned using CAT6 Ethernet cables to haul up to 2.5 gbps from clients to switches, and 10gbps connections from one switch to another, and to the server I was using. That would allow all of those 2.5 gbps connections to come together and not bottleneck at the switches.
So after over 7 months of work, this project is coming to a completion. The holdup has been the cost of buying the equipment. The server and its hard drives were the most expensive segment at a cost of about $3200, and the rest of the project cost about $4700, but that includes the Home assistant stuff and the cameras. All told, this project came in at just under $8,000 for everything.
I decided to use LC fiber optic cable, because those cables are capable of up to 40 gbps, even if the switches I have aren’t capable of that. Yet.
So my network looks like this:

There are a couple of single gigabit switches, but they supply a television or some Internet speakers, and those don’t need any more bandwidth than that. One of the switches is a 10gbps SFP switch, and the others are 2.5 gbps with 10gbps uplink connections. The only remaining choke point is my ISP, the 1 gigbit modem, and the gigabit router. Once fiber comes in, I can replace the router and connect to the fiber ONT, and I will have a fully capable 2.5gbps network that can easily be reconfigured to 10gbps. The wires will already be there if I want to transition even higher at some point.




