[Bug 265714] igc(4) drops link under high traffic

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265714

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kib@FreeBSD.org

--- Comment #31 from Konstantin Belousov <kib@FreeBSD.org> ---
It seems I was also just beaten by the link drop on 226-V:
igc1: <Intel(R) Ethernet Controller I226-V> mem
0xdca00000-0xdcafffff,0xdcb00000
-0xdcb03fff at device 0.0 on pci3
igc1: attach_pre capping queues at 4
igc1: EEPROM V2.23-0 eTrack 0x80000397
igc1: Using 1024 TX descriptors and 1024 RX descriptors
igc1: msix_init qsets capped at 4
igc1: intr CPUs: 8 queue msgs: 4 admincnt: 1
igc1: Using 4 RX queues 4 TX queues
igc1: attempting to allocate 5 MSI-X vectors (5 supported)

Running stable/14 as of week old, link is 1Gb.  Some combination of
ifconfig down/up and physical cable re-insertion fixed the problem for now.

Is it 'recommended' to get the link to 2.5G? I can insert the dumb switch
between
the machine and the managed port.

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