Network connection lost suddenly, switches went to adpoting one by one

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Network connection lost suddenly, switches went to adpoting one by one

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Network connection lost suddenly, switches went to adpoting one by one
Network connection lost suddenly, switches went to adpoting one by one
2023-03-15 09:34:55
Tags: #Adoption #Troubleshooting
Model: OC300   ER7206 (TL-ER7206)  
Hardware Version: V5
Firmware Version: 1.14.7 Build 20221206 Rel.60706

Network consisting of 16 TP-Link switches and 50 access points suddenly lost connection, switches went to adopting state one by one with failover IP and were unable to reconnect until router and controller were restarted. Also in Wired networks under LAN tab, there was an error saying {LANNETWORK.NO_WAN_TIP} but the router showed connection to internet. Under statistics tab, on router there was a peak of 31 connected clients right before and during the loss of connection. Otherwise there were only 1 or 2 clients connected to the router. Clound and local management was working and controller was online. 

 

Clients on router right before and during loss of connection - what could cause this?

 

 

Graph showing switches getting disconnected one by one

 

Error showing under LAN tab in Wired networks

 

 

 

Model:

TL-ER7206 v1.0

Firmware Version :

1.2.3 Build 20221104 Rel.41500

 

Model:

Omada Controller_OC300

Firmware Version :

1.14.7 Build 20221206 Rel.60706

 

 

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#1
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4 Reply
Re:Network connection lost suddenly, switches went to adpoting one by one
2023-03-15 12:35:09

  @kolas 

 

You probably want to link the controller/devices to a syslog server.  So you get a better error message from the logs.  

 

When the whole switch drops, my 1st thought goes to STP.  STP maybe firing off and blinking the ports.  

I can not teach anyone anything - I can only make them think - Socrates
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#2
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Re:Network connection lost suddenly, switches went to adpoting one by one
2023-03-15 13:43:54

  @KimcheeGUN looks like the first thing what happens is that it stops giving IP addresses through wifi then LAN drops and then switches go to adopting state, maybe a problem with gateway? But we will check loop protection as well.

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#3
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Re:Network connection lost suddenly, switches went to adpoting one by one
2023-03-15 15:45:53

  @kolas 

 

Also check your Router Memory stats, wondering if this is a similar problem to the one I'm chasing on the ER605 builds.

<< Paying it forward, one juicy problem at a time... >>
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#4
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Re:Network connection lost suddenly, switches went to adpoting one by one
2023-03-16 04:51:18

Hi @kolas 

 

On your log is there any thing looks like "xxxx port Gi1/0/x blocked"? 

If so, there could be a loop on the network, and switch's loop detection took effect. 

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#5
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