RBR20 ethernet backhual issue

Question

Hi,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I am trying to use a mix of 5G + ethernet backhaul setup for rbr20 system. I have 3 rbs20 satellite.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I use rbr20 as access point mode. All my 3 satellites are working fine now through the 5G backhaul.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; However, when I try to plug in ethernet to one of the satellite, my router seems to get hit by some kind of&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; network storm and the cpu usage on my vpn router shoot up to 100%. The connection still show as using 5G wireless.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Note that I have 2 level of dumb network switches between the rbr20 and rbs20 statellite in that experiment,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; not sure if that makes a difference.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I saw a youtube video mentioned that the ethernet backhaul connection from the satelliet has to be directly plugged&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; into the back of the main unit (i.e. rbr20) without going through a network switch. Can someone confirm that?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Here is the cofiguration that I am tring to get it to work:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ISP -&gt; VPN router -&gt; RBR20 (as wireless access point)&nbsp; -&gt; 5G backhual -&gt; RBS20 satellite&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -&gt; network switch -&gt; ethernet backhaual -&gt; RBS20 satellite&nbsp;Thanks.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

plemans · Answer

What switches is it?&nbsp;
Also, your diagram with the "+" doesn't say if that switch is plugged into the RBR unit or into your VPN router.&nbsp;
Make sure its to the RBR unit

CrimpOn · Answer

There have been posts describing an "ARP Storm" that sometimes happens when satellites are connected through a dumb switch.&nbsp; Apparently the storm continues for a minute or two and then ceases.
&nbsp;
Does the Orbi stay at 100% CPU for an extended length of time?

raymond008 · Answer

The 100% cpu is on my VPN router (tl-r600vpn), not the orbi unit. It situated the CPU and ended up knock out my network access until I unplug the satellite. I don't think it's related to the rbr20 unit at all ...

Here is my detail setup and connectivities:

ISP -> WAN -> tl-r600vpn -+- LanPort1 --> rbr20 -> 5G backhaul -> rbs20 (x2)

-+- LanPort2 --> tl-sg1024s -+-> gs724t -+-> tl-sg116 -+-> rbs20 (also connected through 5G backhaul at the time)

All my orbi units including rbr20 are on dhcp (i.e. dynamic IP assigned from the VPN router).

As you can see, I try to connect the main unit (rbr20) through multiple layer of switches to satellites.

I try to get a confirmatioin that will the above configuration works or not. Or I have to connect the tl-sg1024s

into the lan port of rbr20.

I wonder if I need to remove the satellite before I re-connect it through ethernet to avoid the ARP storm issue probably triggered by the dual path to the main unit. I haven't tried that yet ...

Thanks.

raymond008 · Answer

Is that the only way it will work?The reason I try not to plug the switch to the rbr20 unit is try to avoid the wireless APbring down the entire network including the wired devices, e.g., during wifi reconfiguration.&nbsp;Thanks.&nbsp;

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RBR20 ethernet backhual issue

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