Hi,

I am using IoT 2050 with V 1.1.1 Example image file. I have configured the IP addresses for P1 as 192.168.1.6, which talks to PLC, and for P2 as 192.168.2.127, which is connected to the customer firewall. Here the issue is i can ping the IP 192.168.2.127, but after 3 or 4 minutes it stops the ping, mentioning destination unreachable. If we reconnect the LAN, it starts pining again. Can anyone please help me on this?

We are facing similar problems too, device works OK for minutes to weeks until all communication is lost on one of the ethernet ports, sometimes eno1 some other eno2.

Connecting and disconnecting to another switch port normally solves the issue, but not always, sometimes a reboot is necessary, but even then, I found situations where a "software reboot" is not enough and I must power cycle it. The switches are just Scalance unmanaged L2.

Looking for information I found related reports for years:

Example 1

Example 2

I went as far as to use tcpdump on the interface, nothing arrives but packets are sent, although they never reach the target, not event ARP frames. Lights at the port are up and blinking on each packet sent. Interface shows status as UP with IP assigned.

Let me know if I you need me to provide more information.

I will try to gather all the information next time the issue manifests and reply back.

Thanks for your support.

EDIT:

The device is connected like this:

eno2: industrial_network, two IPs 10.119.27.1 and 10.119.27.2 range 10.119.0.0/16.

eno1: cell_subnet, two IPs 192.168.0.250 and 192.168.200.1 range 192.168.0.0/16

S7 1500 and all the other OT devices are on the 192.168.0.0 subnet, for example, the PLC has IP 192.168.0.10, and all the other IT devices, like servers are on the 10.119.0.0 subnet.

As you can see in the tcpdump logs, the IOT2050 is desperatily sending ARP frames to get the PLC IP with no response. There should be tons of traffic on that interface as lots of devices are connected to the Scalance switch. Even if I manually add the entry to the ARP table, so that IP packets can be sent to the PLC, only the packets sent by the IOT2050 show up.

PD: Forgot to note that device has stock IndustrialOS installed.