USB Ethernet Interface Periodically Disconnects

[JAlla]

Is there a configuration for the Euclid that will stop it from periodically disabling and then re-enabling a USB Ethernet interface? I want more bandwidth for pulling depth data than I can get over Wifi. However, my connection over the Ethernet USB is unreliable, disconnecting and then reconnecting every few minutes. I am not using the Wifi or hotspot connection at all.

Any advice on any configuration changes to make it stop?

Cheers,

Jim

[MartyG · Accepted solution]

I found a discussion (unrelated to Euclid) where someone else's ethernet was disconnecting every few minutes. It's a long discussion. Ultimately, what got it working in that particular case was simply using a different adapter.

Also, Euclid user McCool said in another post that using a USB 3.0 gigabit ethernet adapter worked for them, with a software configuration similar to that of ethernet-over-USB.

[JAlla]

I think your theory about the USB Ethernet adapter periodically failing is the right one. The same problem happened with two different instances of this brand, CableMatters USB 3.0 to RJ45 Adapter, Model No. 202013. I'm running the stock Euclid Ubuntu 16.04 release that the device shipped with.

Failures happen every 10 to 40 minutes when the device is idle, and within seconds when pushing 75 Mbytes/second through it. Below is a snippet from /var/log/syslog an idle failure through recovery. My initial concern was whether the Euclid modifications to network-manager for Hotspot handling were periodically bringing other network interfaces down, but this failure seems to pop out of nowhere with multiple services simultaneously reacting to a USB disconnect. I'm trying different network dongles now.

Thanks for your help.

Cheers,

Jim

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Nov 15 11:46:02 EUCLID_6D8D dhclient[31543]: receive_packet failed on enx70886b815b6e: Network is downNov 15 11:46:02 EUCLID_6D8D NetworkManager[912]: [1510764362.9796] device (enx70886b815b6e): state change: activated -> unmanaged (reason 'removed') [100 10 36]Nov 15 11:46:02 EUCLID_6D8D avahi-daemon[850]: Interface enx70886b815b6e.IPv6 no longer relevant for mDNS.Nov 15 11:46:02 EUCLID_6D8D avahi-daemon[850]: Leaving mDNS multicast group on interface enx70886b815b6e.IPv6 with address fe80::477e:8e62:cf45:c9e9.Nov 15 11:46:02 EUCLID_6D8D avahi-daemon[850]: Interface enx70886b815b6e.IPv4 no longer relevant for mDNS.Nov 15 11:46:02 EUCLID_6D8D avahi-daemon[850]: Leaving mDNS multicast group on interface enx70886b815b6e.IPv4 with address 192.168.111.102.Nov 15 11:46:02 EUCLID_6D8D kernel: [180147.333495] usb 2-3: USB disconnect, device number 102Nov 15 11:46:02 EUCLID_6D8D kernel: [180147.333524] usb 2-3.1: USB disconnect, device number 103Nov 15 11:46:02 EUCLID_6D8D kernel: [180147.333529] usb 2-3.1.1: USB disconnect, device number 106Nov 15 11:46:02 EUCLID_6D8D kernel: [180147.335646] usb 2-3.1.4: USB disconnect, device number 104Nov 15 11:46:02 EUCLID_6D8D avahi-daemon[850]: Withdrawing address record for fe80::477e:8e62:cf45:c9e9 on enx70886b815b6e.Nov 15 11:46:02 EUCLID_6D8D avahi-daemon[850]: Withdrawing address record for 192.168.111.102 on enx70886b815b6e.Nov 15 11:46:02 EUCLID_6D8D whoopsie[818]: [11:46:02] Cannot reach: https://daisy.ubuntu.com/ https://daisy.ubuntu.comNov 15 11:46:02 EUCLID_6D8D whoopsie[818]: [11:46:02] offlineNov 15 11:46:02 EUCLID_6D8D whoopsie[818]: [11:46:02] Cannot reach: https://daisy.ubuntu.com/ https://daisy.ubuntu.comNov 15 11:46:03 EUCLID_6D8D NetworkManager[912]: [1510764363.0010] dhcp4 (enx70886b815b6e): canceled DHCP transaction, DHCP client pid 31543Nov 15 11:46:03 EUCLID_6D8D NetworkManager[912]: [1510764363.0011] dhcp4 (enx70886b815b6e): state changed bound -> doneNov 15 11:46:03 EUCLID_6D8D NetworkManager[912]: [1510764363.0021] dns-mgr: Writing DNS information to /sbin/resolvconfNov 15 11:46:03 EUCLID_6D8D dnsmasq[1579]: setting upstream servers from DBus<br style="color: # 2...