igb interface not detecting link down

[Evilham]

On dt., des. 17 2019, Marius Halden wrote:

> Hi,
>
> We have som machines with Intel i350 NICs which after upgrading 
> from
> 11.2-RELEASE to 12.1-RELEASE has started to act up. They will 
> detect
> link and come up initially when brought up, but they will not 
> detect
> link down events when the connection is lost, e.g. if we remove 
> the
> network cable.
>
> This is a big problem for us as they are used in a failover lagg 
> which
> is currently not working due to this.
>
> `ifconfig <if> down ; ifconfig <if> up` does not have any 
> effect. I
> cannot see anything in dmesg or any other logs.
>
> Removing the interfaces from lagg interface does not make any 
> changes to
> this behaviour, nor did disabling `vlanhwtag` which I found a 
> bug report
> for issues with when using these NICs.
>
> Is this a known regression from 11.X? Any advise for how to 
> debug this
> further?


I'd recommend following this bug: 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236724

And adding any information that can be useful.
--
Evilham