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Forum Discussion
PKleeberg
Nov 24, 2021Tutor
Switching backhaul from wifi to wired caused problems...
Guess the old adage if it ain't broke don't fix it applied here.
After years of use I decided to try and switch my Orby router and satellites to an ethernet backhaul from Wi-Fi. The Orbi router is connected directly to a cable modem and connected to my intranet via a ethernet switch (User manual p15 bottom). That has worked for years and the satellitess have been in series via a WiFi backhaul. I connected the two satellites via ethernet to the same intranet network. After a few moments, the router indicated that the satellites switched from WiFi to wired in the Network Map and they were each linked directly to the router (in parallel) It appeared to work at first but then I got odd results. One satellite. Indicated that it was connected to a number of devices whereas the second satellite wasn't connected to any wireless devices. I rebooted the router, satellites and the switch but then I had trouble connecting to the router. Some devices in the house could not connect
I puulled the ethernet cables from the satellites rebooted the router and satellites and everything is working again.
Is there a step that I am missing? I really want to switch to ethernet because I have heard it will work so much better (though it works great as it is).
Paul
15 Replies
- CrimpOnGuru - Experienced User
It appears you have configured ethernet backhaul correctly. The Orbi 'app' is often criticized for not displaying connection status correctly. I often ask, "what does the Orbi web interface show? (http://orbilogin.net) Does the web interface match the app display?
As to ethernet backhaul being "so much better", that depends primarily on the speed of the internet connection. If the internet connection is under 500mb, it may be very difficult to notice a significant difference. The second satellite that was "Daisy Chained" through another satellite to reach the router will show the most improvement, because traffic now takes 'one less hop'.
The big differences between ethernet and WiFi are:
- Ethernet is inherently full duplex. Traffic can flow in both directions at the same time at nearly 1000mb/sec. (I routinely measure over 900mb/sec over ethernet using iPerf3 - a common throughput measuring tool.)
- WiFi is radio traffic where only one device may transmit at a time. Every other device must wait until transmission stops before attempting to transmit. If there are 20 devices connected to the same WIFi channel, then 19 of them must remain silent when one is talking.
- WiFi signal strength diminishes with distance and building materials. Whereas the Orbi RBR50 claims a maximum transmission rate of 1,733mb/sec, notice that footnote in tiny print. In my tests, an Orbi router and satellite within 10 ft. of each other with no walls between them never achieve even half of that speed. In a typical installation, it is much more common to see link rates in the 600-700mb range.
- WiFi has tremendous overhead in the form of Management Frames.
https://en.wikipedia.org/wiki/802.11_Frame_Types
Every access point sends out Beacon frames as often as 10 times a second, and that's just one type of management frame.
With one router and two satellites broadcasting a primary and guest WiFi on the same channel (channel 48 for 5G), that could result in 10 times 3 times 2 = 60 Beacon frames every second. - WiFi is shared. If your neighbors have similar WiFi networks, their access point and user devices may be sharing the same channel, creating the same overhead, and waiting for their turn to broadcast.
So, ethernet connections for both user devices and backhaul links are far superior in terms of maximum capability than typical WiFi links. But, does it matter in real life? Streaming 4K video requires about 25mb/sec, which is probably well within the capability of 5G WiFi as long as you and the neighbors are not attempting to stream 20 videos at the same time.
All that said, if it was practical to connect my Orbi satellites with ethernet, I would do it in a heartbeat.
CriopOn
Thank you for a great reply. I want to clarify a few things that you mentioned.
The place that I noticed the changes was actually in the web interface (Orbilogin.com) with the router. Second, I actually have 200 Mbs download speed so the wired backhaul is really going to make a positive difference especially for the satellite 2. My network is a mixture of 1 Gb ethernet and Wi-Fi.
I will try to direct connecting the most distant satellite (#2) since that should make the greatest difference, however I still do not understand why the router was unable to connect to the Internet after rebooting the router, the satellite, and the main switch. There are also two 8 port switches that the satellites connect to. These switches share ethernet connection with a TiVo, a TV, a Blu-ray disc player, and an Apple TV.
I also have a mixture of fixed IPs in the network with the range of DHCP defined between 60 and 200. I will check to see if there is a IP conflict after connecting satellite #2
I will update this post once I've tried a few other options.
Happy Thanksgiving
Paul
The saga goes on....
I connected the distant satellite (2) to ethernet and orbilogin.net shows that it is wired with a good backhaul status however there are many devices that no longer appear on the web page. the iPhone app shows the status of these missing devices as offline. I am able to use terminal to log into one mac mini with a fixed IP that shows as offline and so a sudo restart. I am able attach to it with either via IP or with "Network" in the finder to see the screen.
Also interesting, a hard wired Apple TV, sitting right next to Satellite 1 still using a WiFi backhaul, cannot be seen by either that web interface or the iPhone app. I am able to ping it.
I am reluctant to reset the devices to factory. It took me a long time to get this right since so many of my devices have fixed IPs and I have a fixed IP Internet connection.
BTW, firmware V2..7.3.22. "the latest"
Any ideas?
Paul