Orbi losing LAN connection

I would reset the entire system and setup from scratch. Yes, should be tried before reverting back. 

I to also have a RBK50 and 1 RBS50 and RBS20. Alll wired thru switches. No issues with v16 FW. 

What is the mfr and model# of this switch in between the RBR and RBS? 

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BasilB wrote:

My setup is   RBR50 with   2    RBs50  and 2 RBS20 satellites.  All the satellites are wired directly to the router and are not daisy chained and only 1 satellite is connected via a switch. This has been working well for some time but recently the network has been losing it's LAN connections. There is no light on the router or satellites but when you look at the system status the internet is connected and the satellites are offline. My devices wired to the network  lose their connection although  wifi seems to work.   A couple of times over the last 2 days I've noticed the  LAN was down but then it restarted as soon as I tried to use a wired PC. I've rebooted the system a few times. It's all very wierd.

 

I had a look at the log and noticed a few instances of [Dos Attack: ARP Attack] from source 192.168.1.xx    xxxxxxxxxxxxxx    coming from my own devices including a Orbi satellite.  There are various other Dos attacks coming from outside but I don't have upnp or port forwarding enabled.

 

It may be a coincidence but the firmware was updated to  V2.5.1.16AU and the satellites to V2.5.1.16 shortly before I strarted having problems. I don't know why the router has the AU (Australia) version while the satellites don't.

 

Any Ideas? I thought about reverting to the older firmware or doing a complete system reset but  thought I'd ask the question here first.

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