[Bug 270163] Intel 82571EB quad port adapter causing ifconfig response delays when only one interface plugged in at boot

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From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 13 Mar 2023 03:29:07 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270163

--- Comment #5 from Timothy Pearson <tpearson@raptorengineering.com> ---
Created attachment 240807
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=240807&action=edit
Kernel output with debugging enabled

Here is a capture of the kernel log with debugging enabled.  Note there are
actually three identical 82571EB cards installed in this box, but only one has
a network cable attached to one of its ports (em11) for this test.

I suspect the device is firewalled by the PCIe controller somewhere between the
"carp: 6@em11: BACKUP -> MASTER (master timed out)" and "Unable to establish
link!!!" lines.

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