loss of network connectivity 12.0-RC1 / re0

[Bob Bishop]

> On 21 Nov 2018, at 21:04, Philip Homburg <pch-fbsd-1 at u-1.phicoh.com> wrote:
> 
>> 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. [etc]

An effect of promiscuous mode is to disable any hardware filtering particularly of MAC addresses. If something in that area is awry then running tcpdump may well ‘fix’ it.

--
Bob Bishop
rb at gid.co.uk