[Bug 254341] igb hung every 5-20 hours. ifconfig down+up solves the problem for next N hours

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254341

--- Comment #6 from Vladislav Shabanov <vlad.shabanov at gmail.com> ---
(In reply to VVD from comment #5)
Thanks. I applied all this -xxx options. 

Interestingly than the NIC hungs exactly after I executed this command line.
Then I executed 
$ ifconfig igb0 -rxcsum -rxcsum6 -txcsum -txcsum6 -tso -lro -vlanmtu -vlanhwtag
-vlanhwfilter vlanhwtso

and it hungs again. I tried one more time with '-vlanhwtso' and it hungs once
more.

Thanks to VVD, now I can reproduce the bug manually. Спасибо :)

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