freebsd stable - Nov 2018 - loss of network connectivity 12.0-RC1 / re0

Hi,

Since installing one of the first betas of 12.0 and yesterday with RC1 I 
notice network connectivity failures every now and then. I have to
see if I can find the time to find a reliable trigger.

11.2 is fine on the same hardware.

Yesterday it was during a run of poudriere that I lost access. Running 
tcpdump on the console showed that the machine received packets but just
didn't respond.

A reboot solved the issue.

If I can find a way to trigger this issue, then I can try other hardware as
well.

i had some weird issues to while upgrading to 12-BETA4 but thought it 
was digitalocean, maybe i should have looked further before destroying 
and creating a new droplet

On 2018-11-21 3:41 a.m., Philip Homburg wrote:
> Hi,
>
> Since installing one of the first betas of 12.0 and yesterday with RC1 I
> notice network connectivity failures every now and then. I have to
> see if I can find the time to find a reliable trigger.
>
> 11.2 is fine on the same hardware.
>
> Yesterday it was during a run of poudriere that I lost access. Running
> tcpdump on the console showed that the machine received packets but just
> didn't respond.
>
> A reboot solved the issue.
>
> If I can find a way to trigger this issue, then I can try other hardware as
> well.
> _______________________________________________
> freebsd-stable at freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at
freebsd.org"

>Since installing one of the first betas of 12.0 and yesterday with RC1 I 
>notice network connectivity failures every now and then. I have to
>see if I can find the time to find a reliable trigger.
On a diffrent machine, this time with em0, starting tcpdump made IPv6 work 
again. 

Two more networking related issues:
- dhclient complains on the console about option 0x52.
- wlan0 connects to a wifi SSID that is not listed in /etc/wpa_supplicant.conf