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Unifi Network 9.0

UniFi equipment is robust and very customizable, though can be finicky due to unpredictable interactions with some equipment. Since replacing my old network with a dream machine pro and usw pro HD 24 I’ve had problems with widely fluctuating download speeds on my Strato E (as high as the 800s but bouncing around to the 200s, 400s, 100s, etc) with a slow overall download speed. I tried switching out cat 6 cables and making UniFi setting changes (both from recommendations here and other forum) with no resolution in sight. WiFiman indicates that my download speed exceeds 1 Gbit/s on isolated speed tests. Other network-connected equipment seems to be functioning properly. I’m concerned that Comcast may be throttling my cable internet speeds, though they provide no clarification when I call customer support. I’ll probably consider trying another router or consider using a VPN. I realize that I haven’t provided all the details of my system in this post, but does anyone note a similar experience with either UniFi products or Comcast cable internet with Kaleidescape? I’ve also reached out directly to Kaleidescape—they were very helpful in doing internal troubleshooting and found no issues with my Strato E or the Kaleidescape server.
Do you have flow control enabled? Nested switches? I was gettint bouncing speeds on my Strato V until i enabled flow control and made sure to set proper priorities for the swtich chain leading to the Strato.
 
I’ve tested downloads both with flow control on (per your setting recommendations on a prior post) and off but with no change in the fluctuating and slow average download speeds. I only have that one switch and my dream machine connections include one from a 2.5 Gbit/s Ethernet port on the Comcast’s modem to a dream machine pro SFP port and another from another dream machine pro SFP port to one on the usw pro HD 24 switch. I believe that answers the question regarding nested switches. I currently have the switch on the default priority setting since I only have one switch—maybe I should manually set it on the lowest number (highest priority) setting to see if this works. I’m not at home now so I’ll have to do any troubleshooting later.
 
Using the toplogy live view when dowloadiing do you see bouncing speeds at all nodes or just at the strato? When i was hav8ng issues it was only at my strato....speeds at the modem to gateway where pegged at max...so i knew the probablem was downstream...on my end not the isp. Strato showed crapton of rx/,tx retries. Flow control fixed that.
 
When I looked at the topology live view the largest trunk/path was going to the Strato, though the size of that path fluctuated. I don’t recall separately seeing any/many rx/tx errors but I can recheck. I don’t have any other download-intensive devices—I have 3 wired APs, an ethernet connection going to a Samsung Frame TV where I mostly use YouTube TV. I had an old Sonos Boost that I removed from system. I have 3 Sonos AMPs connected to the UniFi Switch. An Alarm.com security system controller is connected. There is one cheap non-UniFi switch for other AV equipment (not running while downloading from the Strato E) connected to the UniFi switch.
 
When I looked at the topology live view the largest trunk/path was going to the Strato, though the size of that path fluctuated. I don’t recall separately seeing any/many rx/tx errors but I can recheck. I don’t have any other download-intensive devices—I have 3 wired APs, an ethernet connection going to a Samsung Frame TV where I mostly use YouTube TV. I had an old Sonos Boost that I removed from system. I have 3 Sonos AMPs connected to the UniFi Switch. An Alarm.com security system controller is connected. There is one cheap non-UniFi switch for other AV equipment (not running while downloading from the Strato E) connected to the UniFi switch.
This is what I was referring too....When I was having problems the speed shown at the modem/gateway stayed pegged at max...while the speed shown at the Strato V would fluctuate drastically.

1776875587022.png
 
This is very helpful. Thank you for the clarification. I’ll test this when I’m home later tonight.
Just wanted to say that even thou I no longer have fluctuations or rx/tx retries....I rarely get more than 750 or so from K. Its a steady 750thou. I have similar issue with my PS5Pro and XBOX Series X....those are usually 450ish. Everything else in the house can can d/l at 980ish.
 
Recently I installed an AI Key. Noticed now if people walk in front of my yard chatting, I can look at the TEXT of their talking. Crazy! Not sure that it is even legal. 😂
 
Dream machine pro download speeds match those on the Strato E. Both fluctuate widely and are slow on average. ISP speed tests are fine 939-1,132 Mbps download. The topology view doesn’t display the Comcast speed in the same view. Am I correct in assuming that either the connection between the Comcast modem (using the 2.5 Gbps port) and the dream machine SFP port is faulty (using a cat6a patch cable and a UniFi brand SFP port module) or the dream machine pro itself is faulty? The dream machine pro settings could also be faulty. This is all strange since speed tests all appear to be fine on my APs (I haven’t yet looked at the topology view download speeds for this, though).
 

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This is all strange since speed tests all appear to be fine on my APs (I haven’t yet looked at the topology view download speeds for this, though).
Which speed test(s)? ISPs having been gaming those forever by having local endpoints with prioritized traffic you'll never get with anything else, so it's important to try multiple vendors & methods.
 
Does anyone have any experience with Comcast XFINITY cable internet traffic shaping or throttling Kaleidescape downloads? My next likely step is testing Kaleidescape downloads with a VPN.
 
Does anyone have any experience with Comcast XFINITY cable internet traffic shaping or throttling Kaleidescape downloads? My next likely step is testing Kaleidescape downloads with a VPN.
Never heard of throttling specifically for one service but would not surprise me.

Not sure if you have tried this but one thing to try is taking a laptop and plugging it into the port the K is plugged into and then doing some download tests. If all is good then we know its specifically something with K.

Also, you can run a iperf3 server on your dream machine and then from laptop plugged into port K uses do some iperf3 tests to rule out anything wonky in your network chain to the K.
 
Does anyone have any experience with Comcast XFINITY cable internet traffic shaping or throttling Kaleidescape downloads? My next likely step is testing Kaleidescape downloads with a VPN.
My Strato S is on Xfinity and it matches my expectation for throughput - my service is 300Mbps and a 4K movie takes about an hour and an HD movie takes 20min.

My network topology is: I bought a cable modem (no router) and behind that is a gl.Inet Marble going into a cheap 4port hub/switch into MoCA to the Strato S. Not the most performant.

So, maybe your cable modem is at fault?
 
My Strato S is on Xfinity and it matches my expectation for throughput - my service is 300Mbps and a 4K movie takes about an hour and an HD movie takes 20min.

My network topology is: I bought a cable modem (no router) and behind that is a gl.Inet Marble going into a cheap 4port hub/switch into MoCA to the Strato S. Not the most performant.

So, maybe your cable modem is at fault?
I just had an online chat session with a UniFi support representative. His conclusion based on review of my UniFi support file and brief discussion of my troubleshooting was that it was “strongly suggested that the issue was upstream (ISP/CDN/server-side) or specific to the Kaleidescape service rather than your UniFi network”. He thought it was possible that my ISP (Comcast XFinity) could be shaping or throttling certain types of traffic, especially traffic coming from specific content providers or CDNs. This wouldn’t often show up in standard speed tests.

I’m going to try using a VPN . If this fixes the fluctuating and slow average download speed issue, then I’ll consider purchasing the item below to connect between my Strato E and Ubiquiti switch.

GL.iNet GL-MT3600BE (Beryl 7) Portable Travel Router​

It has WireGuard pre installed and supports speeds up to 1,100 Mbps with dual 2.5G Ethernet ports. WiFi on the device can be turned off.

I admittedly am very green when it comes to all this and am leaning heavily on Claude AI. I also have an email out again to Kaleidescape support.

Yes, the easiest solution would be to try a new modem or try connecting my Strato E to someone else’s network.

I realize this is turning into a rabbit hole that I’ll probably give up on before going much further.
 
I just now connected the Strato E directly to an Ethernet port on my Comcast modem/router (don’t ask me why I didn’t do this earlier) and I’m having the same issues. So it’s either a Comcast modem issue (though separate speed testing benchmarks have been normal) or an ISP/CDN/server-side issue. I bet my traffic is being shaped/throttled. I guess I’ll find out when I try a VPN, though I may have already hit an undefined soft cap on data usage even though I have an unlimited data on my XFinity cable internet plan. As a side note, what is the usual downloading experience when one buys a Terra server and has to download 100s of movies?
 
I just now connected the Strato E directly to an Ethernet port on my Comcast modem/router (don’t ask me why I didn’t do this earlier) and I’m having the same issues. So it’s either a Comcast modem issue (though separate speed testing benchmarks have been normal) or an ISP/CDN/server-side issue. I bet my traffic is being shaped/throttled. I guess I’ll find out when I try a VPN, though I may have already hit an undefined soft cap on data usage even though I have an unlimited data on my XFinity cable internet plan. As a side note, what is the usual downloading experience when one buys a Terra server and has to download 100s of movies?
but isn't your speed test on the VPN going to necessarily be significantly slower due to the overhead that VPNs introduce into the stream?
 
but isn't your speed test on the VPN going to necessarily be significantly slower due to the overhead that VPNs introduce into the stream?
I assume it depends on the VPN. Also, the above device I referenced that interfaces with the VPN supports speeds up to 1,100 Mbps. I pay for 1.0 Gbps with XFinity but get 1.15 Gbps using the 2.5 Gbps port on the Comcast modem.

The picture below shows recent download times for titles on my system—I’ve been troubleshooting, making setting and connection changes on my system to no avail. Something changed at the beginning of the year/late last year since purchasing my Strato E last fall. I don’t recall if it happened before or after I received the last KOS in January (I just received the most recent update this Monday). I also changed to a Ubiquiti network and switched out a Netgear modem for a new Comcast Gateway (free and no rental fee) at about the same time—the gateway has been in both bridge and DMZ mode but without a change in fluctuating and slow Kaleidescape download speeds. I reached out to Kaleidescape at the beginning of the year—the engineers reviewed my case and determined that my Strato E was functioning normally. Life got busy so I’m only coming back to this now.
 

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