Proxmox + OpenHAB: KNX Router losing connection

Recently I tried to move my setup from a Debian Direct Setup (HW: 2010 MacMini) to an LXC Container on a new Intel NUC with Proxmox 8.1.5 installed.

Backup & Restore of OH Config did a great job, all Things are Online.

But after about 5 Minutes OpenHAB (4.1.2) did not receive any Messages from the KNX Router anymore. I can send messages to KNX like Rollershutter, but there are no upates from the KNX Bus like temperatures, button presses, pesence detection.

Other Bindings seem to work correct. The setup has 40 Bindings, 185 Things, 1000 items, …
KNX is the backbone in my house, if KNX and openHAB is not working there is no light because openHAB does the translation to DMX.

If I do a PAUSE on the KNX Router Thing, it starts working again for aprox. 5 Minutes.

I also did a reinstall of the container and OpneHAB with only the KNX Router Thing and 1 KNX Device. Same behavior. KNX Binding on DEBUG Log does not show anything suspicious. Just no new messages…

Maybe @Udo_Hartmann has a tip for me, because I read in some older threads that you are using a similar setup with proxmox…

UID: knx:ip:00c5-01022df6
label: KNX / IP-Router
thingTypeUID: knx:ip
configuration:
  useNAT: false
  readRetriesLimit: 3
  autoReconnectPeriod: 60
  localIp: 192.168.20.11
  type: ROUTER
  localSourceAddr: 1.1.1
  readingPause: 50
  portNumber: 3671
  responseTimeout: 10
UID: knx:device:00c5-01022df6:e9cf2a4023
label: Taster Wohnen
thingTypeUID: knx:device
configuration:
  pingInterval: 300
  readInterval: 0
  fetch: false
bridgeUID: knx:ip:00c5-01022df6
location: KNX
channels:
  - id: bewegung_essen
    channelTypeUID: knx:switch
    label: Bewegung Wohnen
    description: null
    configuration:
      ga: 1.001:6/2/5
  - id: bewegung_wohnen
    channelTypeUID: knx:switch
    label: Bewegung Essen
    description: null
    configuration:
      ga: 1.001:6/2/0
  - id: temperatur
    channelTypeUID: knx:number
    label: Temperatur Wohnen
    description: Ein Kanal zur Verwaltung einer generischen Gruppenadressen mit
      einem DPT (Datenpunkttyp) kompatibel mit Number Items
    configuration:
      ga: 9.001:<4/2/0
  - id: helligkeit_essen
    channelTypeUID: knx:number
    label: Helligkeit Wohnen
    description: Ein Kanal zur Verwaltung einer generischen Gruppenadressen mit
      einem DPT (Datenpunkttyp) kompatibel mit Number Items
    configuration:
      ga: 5.001:<6/2/2
  - id: helligkeit_wohnen
    channelTypeUID: knx:number
    label: Helligkeit Essen
    description: Ein Kanal zur Verwaltung einer generischen Gruppenadressen mit
      einem DPT (Datenpunkttyp) kompatibel mit Number Items
    configuration:
      ga: 5.001:<6/2/2

Please don’t set localSourceAddr.

(Most parts of my setup are similar, but I don’t use a knx/IP router, but only a knx/IP gateway in tunnel mode.)

Thank you for your answer, but sadly that did not solve the problem.

But I was playing around the whole day with my setup and finally it works.
The problem was my concrete setup with unifi, different vlans, … sometimes to much is to much.

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