Deco X68 Drops LAN when WAN goes offline

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Deco X68 Drops LAN when WAN goes offline

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Deco X68 Drops LAN when WAN goes offline
Deco X68 Drops LAN when WAN goes offline
2022-05-21 08:29:34 - last edited 2022-05-21 09:59:34
Model: Deco X68  
Hardware Version: V1
Firmware Version: 1.0.4 Build 20210519 Rel. 36755

Simple: as soon as my ISP goes down, my wired LAN loses all assigned IPs. This means that what should continue working, like local file server/media center access, now becomes dependant on having a live Internet connection. I suspect this has something to do with the "Smart" DHCP feature, as the router is set to connect by Dynamic IP (I can't change this, my ISP requires it) but it also needs to assign IPs locally to my network. Another suspect could be that the Deco is trying to detect an incoming connection on either port, and until it does it treats the wired network as a potential WAN signal. It shouldn't do this unless things are unplugged and plugged back in. This has basically made our local network useless as far as communications go, every time the Internet goes down!

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Re:Deco X68 Drops LAN when WAN goes offline
2022-05-21 10:07:31 - last edited 2022-05-21 10:07:57

  @gn0s1s I'm pretty sure I've figured out that this is due to WAN auto-sensing. Here's a relevant thread, with no solution from TP-Link (shame on you!). 

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Re:Deco X68 Drops LAN when WAN goes offline
2022-05-23 12:07:00

  @gn0s1s 

Hi, Did the ISP service go offline a lot?

And would it be possible to connect the LAN servers to the satellite Deco units?

WAN/LAN auto-sensing is not a problem and it is how Deco works. It saves Deco from the issue that if a fixed WAN port is broken, the whole unit is useless.

Thank you very much.

Best regards.

 

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Re:Deco X68 Drops LAN when WAN goes offline
2022-05-23 12:41:21 - last edited 2022-05-23 12:41:56

@David-TP Yes, I live in a country where Internet access suffers occasional outages, sometimes more frequently.

 

Connecting the LAN servers to the satellite Deco units (1) is not feasible because the LAN is in the room where the fiber connection comes in, and thus is the room where the main Deco unit resides, and (2) makes no sense as the primary purpose of the LAN being wired is so that it can use as much of the bandwidth as possible, without being limited to WiFi. If I connect it to a satellite, I’m limiting the entire LAN to the WiFi connection between the satellite and the main Deco unit. And if the satellite is wired, then I will run into the same problem with the “smart” auto-sensing, won’t I.

 

While I understand what you mean when you say “WAN/LAN auto-sensing is not a problem”, please try to understand what your customer hears when you say that, particularly when it CLEARLY IS a problem for that customer as it knocks off his entire LAN. Other routers don’t do this, this is not ordinary behaviour, and it IS a problem for the customer. As such, you SHOULD consider it a problem for TP-Link as well.

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