USG FLEX 100 - DHCP: PC obtain ip from router

LucaSantamarianova

Hi!!

I have this network:

ONT FTTH

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AVM fritzbox -------- ATM (DHCP)

192.168.188.1

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192.168.188.10 static

USG FLEX 100

LAN1

192.168.100.1

dhcp SERVER ENABLE

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LOCAL LAN SWITCH UNMANAGED

I have a big problem:

from some days, if I leave a dhcp client enable on lan the address assigned is 192.168.188.x from AVM.... But I have a USG in the middle!!!!

if I set IP address manually (192.168.100.x) is all ok

I'm go to crazy....

this system is installed on october 2021.... is all ok... but from some days I have this problem

thanks

CHS

Is there any wrong physical link connected from Fritzbox to unmanagement switch?

Also, did you configure any bridge interface on FLEX100?  What's the IP address offered to you if connect direct PC to FLEX100 LAN port? (disconnect the unmanagement switch from FLEX100 prevent any affect)