Hi,
We have 2 Brother HL-6050DN printers both connected to the network via ethernet. One of the two printers suddenly stopped working about 3 weeks ago. You couldn't access its web interface, couldn't get a ping response and couldn't print to it. We started with all the usual troubleshooting for connectivity problems, but happened to notice that when you ping the printer instead of getting the expected response e.g. "Response from {Local IP}: Destination host unreachable." we were getting this:
Pinging {Printer IP} with 32 bytes of data:
Reply from {Printer IP}: bytes=32 time=3ms TTL=60
Reply from {WiFi Controller IP}: Destination host unreachable.
Reply from {WiFi Controller IP}: Destination host unreachable.
Reply from {WiFi Controller IP}: Destination host unreachable.
Ping statistics for {Printer IP}:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)
Every time you ping the printer you get one response and then the WiFi controller responds with "Destination host unreachable". If I check my ARP cache I see the MAC address of the Meru WiFi controller for the printer's IP address. I contacted Meru support who asked me to send them some logs. I was told that the Meru controller has an ARP proxy feature but they were confused why it was responding for the IP of the printer (which is wired, not wireless) and were going to look into it further. Meanwhile we couldn't leave the printer out of action and got it working by changing its IP. As a test we then went to the second printer and temporarily put the "broken" IP address on it; It instantly stopped working with the same symptoms.
For the next 3 weeks we carried on as normal and totally forgot about the problem. Now all of a sudden both of the printers have stopped working with the same symptoms again. So we now have 3 "broken" IP addresses. Meru's support portal has been up and down since the end of last week and I've had no response to my ticket. It also doesn't help that they start work half an hour before I finish work due to different time zones.
Any help would be greatly appreciated.
Thanks