freebsd10 session/packets close/lost on igb

[Pakhom Golynga]

Hello,
After updated two hosts to freebsd 10 I have problem with network 
(driver igb). When uptime of hosts > ~1-1.5 days host's unexpected 
drop/lost some tcp connections/packets. I try to disable -tso, -rxcsum 
and -txcsum but problem still the same.
I collect tcpdump on client and server side but not yet understood what 
was happening today.
What are recommendation for debug this issue?

Thanks