[Bug 211219] NIC status does not pass into a state of "no carrier" after disconnecting the cable.

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211219

--- Comment #10 from Daniel G <daniel.genis at gmx.de> ---
We're trying to triage a simmilar problem, where after a (panic) reboot the NIC
remains in "no carrier" state, while the switch thinks the link is online. Our
nic's are using lagg with active/passive failover

Running the 10.3-RELEASE kernel (on 10,1 and 10.2 kernels we never had these
issues). (Our) issue also appears to be present in the 10.3-stable branch.

FreeBSD storage1.c1 10.3-RELEASE FreeBSD 10.3-RELEASE #0 r297264: Fri Mar 25
02:10:02 UTC 2016     root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC
 amd64

These are the nic's we're using:

ix0 at pci0:1:0:0: class=0x020000 card=0xffffffff chip=0x10fb8086 rev=0x01
hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '82599ES 10-Gigabit SFI/SFP+ Network Connection'
    class      = network
    subclass   = ethernet

We'll try the hw.em.enable_msix=0 option and report back!

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