Many inquiries about switching to a UniFi network.
Many inquiries about switching to a UniFi network.
In summary, my expertise in networking isn’t strong. I’ve found it challenging to grasp the subject well. What I know is that I’m frustrated with the poor service I receive from my current setup. I’m considering Spectrum (either Spectrum 100d 5u or AT&T at half the price) and will stop using internet until I switch providers. My network setup includes: SB6121 → Netgear R6400, with three iPhones, a MacBook, two smart TVs, a TP-Link smart plug, and Google Home Wired clients (one PC on Windows). Before the modem, there’s no split; it’s a direct line into my home. I’ve dealt with T3/T4, MDD timeouts, and MDD errors for years. Wireless clients often disconnect or show “no network” errors, while wired clients struggle with slow speeds—sometimes dropping entirely. I also see intermittent speed drops on the wired side. Error logs reveal issues like unrecognized OIDs and sync failures.
I’m weighing options: UniFi seems more stable than consumer gear. I think a single AP would suffice for my modest home, and the R6400 should cover all areas. I’m open to suggestions—anything I can add or change would help. Regarding the USG (Ubiquiti), I’m unsure if it’s necessary since I don’t need Cloud Key monitoring or frequent tweaks. It might just be a router in my current plan. For the USG, its role isn’t clear; it could act as a router but may not handle security like WPA2. In my setup, replacing it with an Edge Router X SFP would change the network path, but I’d need to confirm how that affects performance.
My main concerns are reliability and speed. I want something robust, not prone to outages or slowdowns. If you have more details, it would be helpful!
I’d also consider swapping your modem; the SB6121 runs on the Intel Puma 5 chipset. This isn’t bad—compared to the Puma 6, which is quite problematic, and the Puma 7, it’s still not great—but it does have some timeout problems that other brands don’t. Good options include the Arris SB6183, Netgear CM600, or for long-term planning the Arris SB8200. The USG handles both router and firewall tasks. What matters most is that you can’t just jump straight from the modem to the switch; you need a device that supports NAT so all your devices can share one IP from your ISP. How big is your home? If it’s over 1500 square feet, a single access point like the UAP-AC-LR would be ideal. The Edgerouter X SFP can power AC Lite and/or AC LR with passive 24V, but if you want more flexibility, the EdgeRouter POE is better—it supports both 48V and 802.3af active POE. This matters if you plan to upgrade later to a UAP-AC-Pro or any newer Unifi AP, since Ubiquiti won’t release new 24V models. Regardless of your choice, you’ll likely need to set up some ports as switches so file transfers between your wired PC and the AP run at full speed without draining CPU resources. On the Edgerouter X SFP all ports can be switched, but for your needs you should keep eth0 separate from the switch. The EdgeRouter POE ports 2 through 4 can be grouped together. Switching to an EdgeRouter instead of a USG+US-8-60W means you’ll have two management points, which isn’t ideal since EdgeRouter isn’t part of Unifi. Another downside is that you only get passive 48V POE, not the active 802.3af version. To keep your setup functional, the controller must stay online—this covers everything, including cloud access via a passthrough connection. The controller runs software that can be installed on almost any computer, even a Raspberry Pi. Features like the guest captive portal need the controller running constantly, which is usually fine for most users. The Cloud Key lets you run the controller 24/7 without needing a separate machine, but it’s important to understand this setup. Many people set up Unifi using one computer as the controller and then lose access if it fails. If you opt for a Cloud Key, make sure you get the Gen 2 model (UCK-G2) with its modern design and LCD—Gen 1 models have significant drawbacks that make them less practical.
I need to agree with @brwainer's idea about replacing the modem. You're likely at the limit your cable company can push. Remember, most providers can't exceed the modem's rated speed. I'm referring to the maximum for the SB6141 (my modem). Upgrading to a better modem that handles lower speeds offers benefits. For example, if some channels are problematic—like interference or high usage—having more channels won’t cause noticeable slowdowns with higher-capacity modems. It also means you won’t need to replace your modem if your ISP provides a free speed boost. I recommend a 16x4 or 24x8 Docsis 3.0 model. If you prefer a 32x8, go for the Docsis 3.1 since the 3.0 version is limited by the Intel Puma 6 chip.
Apologies for the delay in getting back. I ended up working two shifts to cover someone who called in sick last minute. Regarding the modems, which one do you prefer? After some research, the SB6183 isn’t doing well, the CM600 is decent, and the SB8200 might be too much later on. I didn’t mention that this setup isn’t mine—I’ve moved back home to help my mother with her grandmother since my dad passed in late 2017. Once I’m out, she’ll have just a few wireless devices: one phone, a smart TV, and a MacBook. The extra bandwidth you think might be needed now won’t matter much. A UniFi setup would be overkill, but I want her to have a solid network when I’m gone, mainly so her Wi-Fi stays stable.
Also, I found out the coax line splits before the 6121. One cable goes into a splitter, then connects to the SB6121 and TM602. The TM602 seems only for phone service—it doesn’t connect to anything else after the splitter. I’m not sure if this will cause problems, but it might.
My estimate is the house is about 1700 sq ft, with networking right in the center of things. If that’s true, the USG/US-8-60w would be a good fit. Once my grandmother passes, I’ll be away again and she’ll take over several devices—TV, phone, smart plug. It’ll be easier for me to teach her, so I won’t need a guest network or remote access.
Thanks for your help, both of you! @Donut417
I usually favor Arris modems, but at the moment I’d suggest the CM600. Regarding the split line and the TM602, I don’t think there will be any problems with that.