[Bug 290973] qlnxe: nic aggregation (using lagg) not working unless promiscuous mode is enabled

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290973

--- Comment #2 from Zhenlei Huang <zlei@FreeBSD.org> ---
(In reply to peter.sopko+freebsd.org from comment #0)
> nics using if_qlnxe can't be used as laggdev in a lagg interface, unless they are
> put to promiscuous mode.

It appears the interface is filtering out the LACP packets ( slow proto, aka
ether proto 0x8809 ), so the promiscuous mode comes a rescue.

Can you do traffic sniff on one of the lagg member say ql0 ? Please do not
enable the promiscuous mode, you can do that with

```
# tcpdump --no-promiscuous-mode -envi ql0
```

and share the captured traffic ?

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