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Hi all!

I am trying to run an OPNsense firewall on our site connected via an Ethernet Switch and PPPoE. But the connection drops after a few minutes and is not reastablished by the firewall.

Problem description:
- Hardware is a OPNsense DEC2750
- Running OPNsense  22.10-amd64
- We are connecting via Ethernet to a switch in the same rack (which is connected using fibre) on Port 1 of the DEC2750
- For connecting to ISP (Wilhem.Tel), PPPoE ist used.
- Connected to an ECS4120-28T Edge-Core swittch.
- PPPoE is very unstable when using the OPNsense HW, PPPoE drops every 5-30 minutes and is (sometimes) recovering with the device shown up in the dashboard, but no external IP-Adress is established. It also seems just to restart the multilink ppp daemon without any known reason:
<30>1 2022-11-16T19:27:01+01:00 OPNsense.localdomain ppp 90184 - [meta sequenceId="145"] [wan] IFACE: Rename interface ng0 to pppoe0
<30>1 2022-11-16T19:27:01+01:00 OPNsense.localdomain ppp 90184 - [meta sequenceId="146"] [wan_link0] rec'd unexpected protocol IPv6
<30>1 2022-11-16T19:27:01+01:00 OPNsense.localdomain ppp 90184 - [meta sequenceId="147"] [wan_link0] rec'd unexpected protocol IPv6
<30>1 2022-11-16T19:27:01+01:00 OPNsense.localdomain ppp 90184 - [meta sequenceId="148"] [wan] IPV6CP: rec'd Configure Ack #1 (Ack-Sent)
<30>1 2022-11-16T19:27:01+01:00 OPNsense.localdomain ppp 90184 - [meta sequenceId="149"] [wan] IPV6CP: state change Ack-Sent --> Opened
<30>1 2022-11-16T19:27:01+01:00 OPNsense.localdomain ppp 90184 - [meta sequenceId="150"] [wan] IPV6CP: LayerUp
<30>1 2022-11-16T19:27:01+01:00 OPNsense.localdomain ppp 90184 - [meta sequenceId="151"] [wan]   f690:eaff:fe00:959c -> 066c:9dff:fe54:bc13
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="1"] Multi-link PPP daemon for FreeBSD
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="2"] 
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="3"] process 51937 started, version 5.9
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="4"] web: web is not running
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="5"] [wan] Bundle: Interface ng0 created
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="6"] [wan_link0] Link: OPEN event
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="7"] [wan_link0] LCP: Open event
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="8"] [wan_link0] LCP: state change Initial --> Starting
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="9"] [wan_link0] LCP: LayerStart
<30>1 2022-11-16T19:33:25+01:00 OPNsense.localdomain ppp 51937 - [meta sequenceId="10"] [wan_link0] PPPoE: Connecting to ''
<30>1 2022-11-16T19:3


- The same connection is rock stable with an ASUS RT-AX55 Router.

- I also noticed that the LAN-side also seems to be unstable with multiple messages on client laptop side:
[203836.547849] r8152 5-1.1:1.0 enx3ce1a14b1c51: carrier off
[203839.811482] r8152 5-1.1:1.0 enx3ce1a14b1c51: carrier on
[204049.364973] r8152 5-1.1:1.0 enx3ce1a14b1c51: carrier off
[204056.340051] r8152 5-1.1:1.0 enx3ce1a14b1c51: carrier on
This LAN connection is also stable when using the ASUS Router.

Might this be an hardware issue? Or any ideas, what is going on?

Thanks in advance,
Arne