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Forum Discussion
RBK852 is giving me high latency/delays during video conference (coming from Google Wi-Fi)
I recently switched to an RBK852 system from Google Wi-Fi because of various speed and coverage issues. The Orbi system blew my mind: 3x speed improvement, full coverage, fewer satellites. Everythin...
leoport I have read through your "excellently presented" information, replies and a couple things caught my eye. Lots of variables.
Love your car in the garage!
First, your Arris SB6141 Cable Modem is not only a bit dated, but has the Intel PUMA 5 Broadband Modem Chipset. Of which the PUMA 5 - 7 chip families were/are plagued with performance issues that causes(d) severe latency. I have several SB6190's that have the PUMA 6 chipsets that caused me major problems with VoIP Services and Latency. Bookends that I can't resell. Here is a link to a "The Register", out of England, article explaining the PUMA 5-7 Issue:
https://www.theregister.com/2017/08/09/intel_puma_modem_woes/
I have a 2010 MBP running 10.14.6, have read many reviews of various performance issues with the newer macOSs and I'm comfy, with the ORBI RBK853 connected to a Calix 716 ONT Fiber converter with a ~940Mbps connection. And even with that I always connect my laptop to a Cat7 hardwire that is off a 5 port Gigabit Hub that is fed by a 50' Cat8 Trunk directly plugged into the RBR and have had no issues. Lately helping friends figure out an Ooma issue, they were using it wirelessly, I found out that the process of WiFi doesn't work well for VoIP. I would imagine that Teleconferencing would be about the same. Although I haven't used Google Meetings, but Zoom and Skype and they have been perfect. Also your testing being through a browser introduces "overhead" that doesn't help in accurate readings. I have also been using Zoom for TeleMed appts for a very long time wirelessly with no issues either. But then I have had providers that are on huge high-end Networks and their end is horrible.
From what it sounds like you have "Some Traffic", Obstructions and are kinda pushing things to an extreme with the "100' wire" and trying to stretch things out. I use nothing less than Cat7 anymore and try to keep things within a logical range.
I would recommend trying this, along with what FURRYe38 has posted, and see what happens:
- Advanced > Setup > Wireless: Turn on the AX Settings. And maybe turn them off to see what that does.
- Advanced > Advanced > Wireless Settings: Turn Off "Coexistence"; Leave WMM on; Change RTS/CTS to 2347 (or try 2346) for both 2.4 & 5.
- And for the time being treating VoIP and VCs like "Needy Spoiled Brats" that appeasing would be much easier than ignoring.
So after dinking around with all that let us know what you come up with and if there are still issues, we'll go from there. You're like me, lots of "stuff" going on and one thing that you'd never expect to have any problems with . . . ya do! Sometimes my WiFi Lights make me nutz when they can't "phone home to the Mothership". They blink at 100% until they can talk to "Mom". Not really a great thing at 4am.
Hope this helps. I'll be watching . . .
. . . sO
FarmerBob1 wrote:
First, your Arris SB6141 Cable Modem is not only a bit dated, but has the Intel PUMA 5 Broadband Modem Chipset. Of which the PUMA 5 - 7 chip families were/are plagued with performance issues that causes(d) severe latency.
Although this modem may be outdated, I struggle to understand how:
- The same MacBook.
- Running the same Google Meet diagnostics
Will show such a dramatic difference in latency between the Google WiFi and Netgear WiFi when they are both connected to the same modem. I would think if the modem cannot handle the traffic, then it cannot handle the traffic for any router that is connected to it.
When the laptop is connected to the router using Ethernet cable, then there is almost zero latency. The only difference appears to be the WiFi connection between router and Macbook.
FarmerBob1 wrote:Your Arris SB6141 Cable Modem is not only a bit dated, but has the Intel PUMA 5 Broadband Modem Chipset.
Although I haven't used Google Meetings, but Zoom and Skype and they have been perfect. Also your testing being through a browser introduces "overhead" that doesn't help in accurate readings.
From what it sounds like you have "Some Traffic", Obstructions and are kinda pushing things to an extreme with the "100' wire" and trying to stretch things out. I use nothing less than Cat7 anymore and try to keep things within a logical range.
I would recommend trying this, along with what FURRYe38 has posted, and see what happens:
- Advanced > Setup > Wireless: Turn on the AX Settings. And maybe turn them off to see what that does.
- Advanced > Advanced > Wireless Settings: Turn Off "Coexistence"; Leave WMM on; Change RTS/CTS to 2347 (or try 2346) for both 2.4 & 5.
- And for the time being treating VoIP and VCs like "Needy Spoiled Brats" that appeasing would be much easier than ignoring.
Thanks for all the info and suggestions!
- I didn't know about the problems with the SB6141... I've been meaning to upgrade it, but my bandwidth hasn't "needed" me to yet. Maybe you gave me just the excuse to do so anyway đ
- Regarding the testing in the browser (and probably goes for the old modem too)... the thing is, all other factors being the same, when I use the Orbi, I'm getting strange round-trip/latency issues - when I go back to Google Wi-Fi, they are gone. That's the frustrating part. As I mentioned in my original post, everything else seems fantastic (3x speed improvements, 2-3x better ping, better coverage, etc)... I would have expected VC latency to have improved as well. ( I'm literally just taking the ethernet cables out from Google Wi-Fi and putting them into Orbi - and vice versa - well, and also making sure to power off the system I'm not using).
- âQuestion: I'm assuming that it's fine to connect the first LAN port from Orbi to my bigger switch, correct?
- Also I probably exaggerated the length of those ethernet runs. Looking at the diagram, there are ethernet cables going up the inner walls of the rooms on the right side and make their way across the room to then go down to the "network area" in the garage (where the router is). Anything plugged into ethernet is totally performing fine for my needs đ
- What I didn't include in my OP was the experimentation I did with Coexistence, WMM, RTS/CTS. Things I actually did try changing (all independently):
- Turned Coexistence Off
- Turned off WMM for the 2.4GHz band (I didn't need some of my IP Cameras to get priority)
- Tried 32, 512, 2347 for RTS/CTS
- I tested after each (meaning, I looked at the graph) - nothing really changed. For some of the tests, I noticed the graph wasn't as "smooth", but there was still a consistent wave of latency.
Still, I'm going to try various amounts of futzing and see what happens.
Please avoid changing CTS to 2347. Please use default settings. CTS should not effect any latency as this is for collisions between the RBS and 3 or more deployed RBS. You can test this value however I recommend leaving at 64 after testing.
