[Bug 218653] Intel e1000 network link drops under high network load

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218653

--- Comment #1 from nn <freebsd at t.lastninja.net> ---
Further investigation and it happens during any kind of network load activity,
usually when traffic goes beyond 10Mbps.

So this happen when using portsnap, pkg install, etc.

I have also disabled tso4 and vlanhwtso. I think it made things a little more
bearable but the issue still persists.


# ifconfig em0
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
       
options=209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC>
        ether 00:30:48:8b:55:de
        inet 104.149.6.19 netmask 0xfffffff0 broadcast 104.149.6.31 
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active


[root at armakuni ~]# netstat -I em0
Name    Mtu Network       Address              Ipkts Ierrs Idrop    Opkts Oerrs
 Coll
em0    1500 <Link#1>      00:30:48:8b:55:de    88189   476     0    49789     5
    0
em0       - 104.x.x.16/ xxx.xxx                86581     -     -    50046     -
    -

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