[Bug 261746] hn(4): Communication stops when enabling SR-IOV secondary mlx5en(4) interface (640FLR-SFP28) on Windows Server 2022

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From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 07 Feb 2022 05:20:56 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261746

--- Comment #4 from Wei Hu <weh@microsoft.com> ---
The logs look normal to me. Several questions:

1. If only the second SRIOV nic (Mellanox CX-4) causes problem, what happen if
you just enable this nic, not enable the first one (Mellanox CX-3)? Does the
second interface work in this case?

2. How do you enable and disable the SRIOV interfaces?

3. How do you verify that the second interface stopped working? 'sysctl -a |
grep mce' gives a lot of stats on the mce interface. Do you see any number
changes after loading some traffic on this interface?

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