SPAM in syslog

Olli Mannisto

Syslog is full of messages about network. This repeats every five seconds:

Nov 14 11:33:17 ubilinux4 connmand[415]: lo {newlink} index 1 address 00:00:00:00:00:00 mtu 65536
Nov 14 11:33:17 ubilinux4 connmand[415]: lo {newlink} index 1 operstate 0 <UNKNOWN>
Nov 14 11:33:17 ubilinux4 connmand[415]: enp2s0 {newlink} index 2 address 00:07:32:49:B1:FF mtu 1500
Nov 14 11:33:17 ubilinux4 connmand[415]: enp2s0 {newlink} index 2 operstate 2 <DOWN>
Nov 14 11:33:17 ubilinux4 connmand[415]: enp3s0 {RX} 176483 packets 241274104 bytes
Nov 14 11:33:17 ubilinux4 connmand[415]: enp3s0 {TX} 77094 packets 5704376 bytes
Nov 14 11:33:17 ubilinux4 connmand[415]: enp3s0 {newlink} index 3 address 00:07:32:49:B2:00 mtu 1500
Nov 14 11:33:17 ubilinux4 connmand[415]: enp3s0 {newlink} index 3 operstate 6 <UP>
Nov 14 11:33:22 ubilinux4 connmand[415]: lo {newlink} index 1 address 00:00:00:00:00:00 mtu 65536
Nov 14 11:33:22 ubilinux4 connmand[415]: lo {newlink} index 1 operstate 0 <UNKNOWN>
Nov 14 11:33:22 ubilinux4 connmand[415]: enp2s0 {newlink} index 2 address 00:07:32:49:B1:FF mtu 1500
Nov 14 11:33:22 ubilinux4 connmand[415]: enp2s0 {newlink} index 2 operstate 2 <DOWN>
Nov 14 11:33:22 ubilinux4 connmand[415]: enp3s0 {RX} 176620 packets 241286624 bytes
Nov 14 11:33:22 ubilinux4 connmand[415]: enp3s0 {TX} 77103 packets 5705119 bytes
Nov 14 11:33:22 ubilinux4 connmand[415]: enp3s0 {newlink} index 3 address 00:07:32:49:B2:00 mtu 1500
Nov 14 11:33:22 ubilinux4 connmand[415]: enp3s0 {newlink} index 3 operstate 6 <UP>

Obviously the log is not very useful with all that..

WereCatf

It looks a lot like something is constantly bringing the interface down and then connman brings it back up. I don't get that myself on my board.

Olli Mannisto

Are you using the ubilinux 4 version?

eduncan911

I see two network cards, so I assume this is an UP Squared board. As ollittm asked, please confirm it is the latest version of Ubilinux4 (I see it in the log, but not sure if it is beta or RTM). And I'll agree with WereCatf statement: I haven't seen these with my UP Square boards either.

Something else to consider is your physical network: cables, network switch/hub, power supply, etc.

Olli Mannisto

eduncan911 wrote:

I see two network cards, so I assume this is an UP Squared board. As ollittm asked, please confirm it is the latest version of Ubilinux4 (I see it in the log, but not sure if it is beta or RTM). And I'll agree with WereCatf statement: I haven't seen these with my UP Square boards either.

Something else to consider is your physical network: cables, network switch/hub, power supply, etc.

Well:
ubilinux@ubilinux4:~$ uname -a
Linux ubilinux4 4.9.45-ubilinux+ #2 SMP Fri Sep 8 10:51:36 IST 2017 x86_64 GNU/Linux

At least it's the file available from downloads with apt updates applied. For what it's worth, I have RPi on the same switch not generating these errors. Instead it's spamming WLAN messages.. I haven't configured WLAN at all for UP^2 so it's not probably that.