@David-TP 

Hi David,

1. I have no way of knowing exactly how often this occurs.  The Deco app (at least the iOS version) does not offer a setting to send a notification when a Deco goes offline (I've requested this feature with support).  So the only way I have of knowing that the app is reporting one or more Decos as offline is either

a) I happen to be looking at the app when this occurs, e.g. while setting up an IoT device.  otherwise I have no reason to keep looking at the app constantly.

b) I happen to walk past a Deco and notice that it's gone red, and then check it in the app (although as I said, sometimes a Deco will be offline in the app and still show green on the Deco.  that's what happened this time. so this is hardly a reliable way to check whether any Decos are offline)

c) I notice that one or more of my devices has started acting flaky (e.g. the TV starts pausing to buffer content frequently, or one or more of my smart switches starts flashing which indicates that it's lost contact with the network, or my phone switches from WiFi to 5G randomly.  this is how I usually discover that a Deco is offline)

2. I've observed this with 2 of my 3 XE75s and at least 2 of my M5s.  Although, since the M5 in the case I reported yesterday had been connected through the XE75 that went offline, it wasn't actually a problem with the M5 (at least this time).  As soon as I power cycled the XE75, both the XE75 and the M5 connected through it came back online.  My somewhat educated guess (I'm a software developer but not a network specialist) says it's a problem with the XE75s.

3. Iv'e attached a screenshot of the network topology below.

Thanks

John

  @jmporter 

I have exact same issue. Please post any resolution you come across.

I've had the same issue at least twice now in the last few months, including at the time I write this.  I have a pair of XE75 nodes and a pair of X55 nodes.  Both X55 nodes and the non-wired XE75 node go offline and stay that way more or less indefinitely unless I power cycle them.  While they're on, they're zombies - clients connect to the "offline" nodes but then of course can't connect to the gateway/router, which means the clients cannot automatically fail over to at least the one "working" node, provided it's in range.  I'm not actually sure the wired XE75 is working correctly either, it's just the only one that shows as "online".

I would love to provide logs and any other information to engineers to get this resolved.  I have recommended the Deco to multiple friends and family members, but if this keeps happening I'm going to have to look elsewhere.  And while I'm at it - will there ever be a local DNS server built in to the firmware?  I realized just a few days ago that no such feature is available and now I'm -really- questioning whether this is the right solution, as every other wireless solution I've ever had (LinkSys, ASUS, Plume, etc) has allowed me to manage DNS entries for local network clients.

  @jmporter 

I've had the same issue, it's constant (on, off, on off, etc).  I have a pair of XE75 nodes and a X50 Outdoor node.  All nodes nodes are wired. When I "Check Again" to see if it will go online sometimes it does but most time it doesn't. A power cycle usually fixes the issue but again sometimes it doesn't. I have clients, & IOT devices constantly hopping back and forth to Nodes.  I'm not actually sure the primary XE75 is working correctly either, it's just the only one that shows as "online".

I would love to provide logs and any other information to engineers to get this resolved. 

Kieth

  @jmporter I just experienced the same issue.

My network consists of 4 Deco X50-PoE. This morning I noticed the WiFi was not performing properly and upon opening the the Deco app I saw that 3 of the X50s were offline. The status light of the 3 X50s were green indicating the X50-PoE is connected.

Repeated attempts to force the app to see these Decos as online failed. The only thing that worked was to reboot the 3 Decos that were offline one at a time.

My Decos have hardware version of v1.6 with the latest firmware, 1.2.5 Build 20231122 Rel. 58711.

Tp-Link this needs to be addressed.

--

Rick

  @jmporter I have the same problem. It just started out of the blue this week. I have 4 BE63 units. Locations haven't changed and they went from working perfectly one day to going offline constantly. They stay offline and a reboot may work but usually doesn't. All keep a green light but are offline in the app. 
 

one common theme amongst everyone here with this issue is more than two or three units. Probably not related but I noticed this. 
 

since it started so quickly, I assumed it was a bad firmware update. But now I doubt that. I have used a deco mesh for years without issue. The Be63's are brand new and worked great two weeks solid before this started happening. It is not signal strength related. I can literally have the unit a foot from the main unit and it will do the same thing. 
 

please post if anyone finds a solution. While they are doing this they are not functional. If this isn't fixed soon I will be forced to buy a different brand. 

  @RustyK update: I did a network optimization scan and it detected interference and switched some channels. Immediately after, one of my two disconnected units reconnected to the network on its own. The second has remained offline. The unit remaining disconnected is the unit I bought separately and paired manually, but probably not related. 
 

I doubt this is coincidence that one did reconnect at this time. Perhaps an engineer may have some ideas.

  @RustyK Final Update/Partial Solution: wireless interference does seem to be the main issue. I had a secondary wifi router in the same room as the primary deco and with its wireless enabled it was giving many problems to the deco unit. I only had its 2.4Ghz band turned on but when I turned off all wireless it helped the random droppings of my other deco's a lot. I have noticed however, when I have a deco unit not connected it too generates wireless interference with the others.

my solution was to disable any other electronics nearby on the same the frequencies, especially other wifi routers. Then use the "optimize network" feature on the main deco unit to select free channels. That got all of my units connected together again.