@psychedelicu2 

Why do you have another ip than router, do you have multiple dhcp servers in network or do you have a lage network

  @MR.S No, it just needs a full nigh or day to be adopted after restart. 

  @psychedelicu2 

The switch has the wrong IP, so no wonder there are problems. you need to check why switch has 192.168.0.98. The switch does not get this IP address by itself. Fallback IP Address is default 192.168.0.1

  @MR.S The issue is with software controller, not the switch. The internet or DHCP server is working just fine with or without the correct IP address. That IP or error appears anytime when i restart both devices, because the router needs 10 minutes to start and the switch only 1 or 2.  But is working fine and before that it was on the same LAN, so it is now. 

This is a very well-known problem on reddit and on the forums, I'm not the only one who has it.

Also, I'm not the only one who has this issue with slow internet after some time.

https://community.tp-link.com/en/business/forum/topic/608700 

  @psychedelicu2 

ok, how is the software controller? is it connected by cable and has a fixed ip or does it have wifi and a dynamic ip. I still don't understand where the switch gets 192.168.0.98 from. I myself have several ER605 routers and have not experienced similar problems. that is, there were a lot of problems in the past but it has been corrected over time.

  @MR.S Please check the attachment. The IP is fixed. Maybe because the switch needs to be restarted after the router is online first, since the DHCP server is on the router? 

  @psychedelicu2 

as i said i have several ER605 and they start up very slowly but the switch and access punk get no ip at all until the router is online and then they connect to the controller straight away. I think it's a misconfiguration in your network that's causing problems, I see you have quite a few servers, I don't know anything about them, but if it's one of them that has dhcp activated, strange things can happen,

  @MR.S I understand. I have only one DHCP server and it's on router. Thanks for your help. I will not bet again on Omada so I'm looking already in another alternative like OPNsense. I'm done with all the drama that comes with the Omada system. Already within a year I have given dozens of resets, both to the devices and to the software controller. Because suddenly one night something breaks down or stops working, without being touched. I don't know about others, some complain, others don't. But from what I read on the internet and reddit, there are 50/50 people who say positive things or negative..

For now i'm hopping that maybe at least somebody from support will ask for a log, or show any interest at least in finding a solution. In a year I have not had any kind of support on this forum or email. 

  @psychedelicu2 

if you tag @Clive_A  then maybe he can make a support case for you or have other suggestions.

yes, I agree with you that there have been a lot of problems with the routers, but they have become more stable in the last year. but all the networks I have with ER605 I have set up an automatic reboot once a month. I don't think it's necessary anymore but it doesn't hurt to reboot.

I hope you figure it out :-)