Duet 2 Ethernet IP address keeps flashing on display.

[alankilian]

Your Ethernet state is: Interface state establishingLink, link down
Mine (Duet2/Ethernet) is: Interface state active, link 100Mbps full duplex

Do you see the connection-state (not traffic) light blinking on the Ethernet connector.

Do you have a different Ethernet cable you can try?

[TheIndianDude]

I tried multiple cables, as that was the first thing I thought of as well. The yellow light is solid on the port when this happened and the green (traffic) light is flickering

[TheIndianDude]

I do have an 8 port switch between my router and the board, so maybe I'll have to see what's going on there?

[TheIndianDude]

I changed to a third cable and this time, the board went into the loop and then restarted. Here's the M122 after restart:

M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.2.2 running on Duet Ethernet 1.02 or later
Board ID: 08DGM-917DA-G4MS8-6JKD2-3S06R-T9TRB
Used output buffers: 1 of 24 (2 max)
=== RTOS ===
Static ram: 23460
Dynamic ram: 68848 of which 40 recycled
Never used RAM 19732, free system stack 195 words
Tasks: NETWORK(ready,548) HEAT(blocked,337) MAIN(running,471) IDLE(ready,20)
Owned mutexes: USB(MAIN)
=== Platform ===
Last reset 00:00:14 ago, cause: software
Last software reset at 2021-02-27 15:42, reason: StuckInSpinLoop, GCodes spinning, available RAM 19732, slot 0
Software reset code 0x0083 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0040080f BFAR 0xe000ed38 SP 0x20001fac Task NETW Freestk 467 ok
Stack: 004073fb 004072c2 01010000 f8000000 40a556ff 418dfce4 b7154800 3331bb4c 40000000 3f317200 b5ddea0e 388aade3 bb360493 3bcb9c8b 00000000 418554cd 38533333 7f7fffff 00000000 60000010 000000f0 000000f0 0040705b 000021c8 000021c8 400e0e00 0040716f
Error status: 0x00
Aux0 errors 0,0,0
MCU temperature: min 17.3, current 18.0, max 18.2
Supply voltage: min 1.7, current 1.7, max 1.8, under voltage events: 0, over voltage events: 0, power good: no
Driver 0: position 0, ok, SG min/max not available
Driver 1: position 0, ok, SG min/max not available
Driver 2: position 0, ok, SG min/max not available
Driver 3: position 0, ok, SG min/max not available
Driver 4: position 0, ok, SG min/max not available
Driver 5: position 0
Driver 6: position 0
Driver 7: position 0
Driver 8: position 0
Driver 9: position 0
Driver 10: position 0
Driver 11: position 0
Date/time: 1970-01-01 00:00:00
Cache data hit count 19863370
Slowest loop: 2.37ms; fastest: 0.13ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest read time 0.8ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is ready with "M122" in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 1.03ms; fastest: 0.01ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 0 of 8
Interface state establishingLink, link down
ok

[TheIndianDude]

And it's not connecting to the network anymore. When this happened last time, I had to keep the board turned off for about 10 minutes and then try again and it connected to the network.

[alankilian]

Do you have any "Cold spray"?
Maybe it's your Ethernet interface chip getting too hot?

[TheIndianDude]

@alankilian I don't, but I have tiny heatsinks that came with my DRV8825 stepper drivers back when I was using RAMPS on my 3d printer. Let me try that.

[TheIndianDude]

The network isn't connecting right now and the yellow link status light on the ethernet port is blinking periodically.

[TheIndianDude]

I reconnected the board after putting on the heatsink on the ethernet interface chip and the network connected. Then it fritzed out 3 minutes later. I'm running out of options here....I've got a replacement Duet Ethernet board on the way. I think I'll test the new board once it arrives and use that if that works... This is beyond frustrating...

[Argo]

@TheIndianDude

When the network isn’t reachable have you already hooked it up with a usb connection and send M552 to check the status of the network module?

[TheIndianDude]

@Argo said in Duet 2 Ethernet IP address keeps flashing on display.:

e have you already hooked it up with a usb connection and send M552 to check the status of the network m

Yes, and M552 shows Network is enabled, configured IP address: 0.0.0.0, actual IP address: 0.0.0.0

This is despite the link status light on the port lit up steadily (amber) and the traffic light (green) flickering.

[Argo]

@TheIndianDude

If then M552 S0 to disable the network and M552 S1 P<ipadress> doesn’t change anything my bet would also be a defective ethernet module.

[TheIndianDude]

That's what I think as well. I just downgraded to firmware 2.05.1 and am having the same issue. I'll get a replacement ethernet module for this board and try it out. I do have a Duet Ethernet board in the mail, so that will be for my second printer

[TheIndianDude]

Ok, so I received my new Duet 2 Ethernet board today and the first thing I did was flashed firmware 3.2.2 on it. It is working without a glitch so far (fingers crossed). I guess the ethernet module on the other board was bad. I have ordered a replacement for it, so hopefully that fixes my problem.