LACP / Slow-protocol issue

[Eugene Grosbein]

11.02.2020 2:30, Mark Saad wrote:

> Hello FreeBSD Hackers
>   I was wondering if there is anyone on-list who has hands on
> knowledge of the "slow-protocols" and in particular lacp .
> 
> I am running a fairly new 12.1-STABLE amd64 r354698 , for reasons I
> can't yet identify a two port lacp lagg has a short <1sec blip where
> switches and lagg members believe each side has stopped distributing
> lacp slow-protocol frames.  I am not super knowledgeable about how to
> diagnose the slow-protocol frames to see who is at fault . Any insight
> here would help.

Just use: tcpdump -s0 -np -i parent0 not ip
Replace "parent0" with name of your real (physical) interface name (one of), like igb0.

You may be facing one of iflib's problems, so try booting FreeBSD 11.3-RELEASE (pre-iflib)
to compare behaviour and see if it runs better or not.