Paul wrote:
What is your kernel HZ setting?

1000

in /boot/loader.conf try adding these two lines:
hw.em.rxd=1024
hw.em.txd=1024

I've already had:
# cat /boot/loader.conf
loader_logo="beastie"
autoboot_delay="3"
hw.em.rxd="4096"
hw.em.txd="4096"

and then do this in sysctl.conf:
net.inet.ip.intr_queue_maxlen=1024

- already

net.route.netisr_maxqlen=512

Ok. I just increased from default 256 up to 512

kern.ipc.maxsockbuf=8388608

It was already higher

kern.ipc.nmbclusters=128000

Ok, I just increased nmbclusters.


I think this should fix your packet loss problem. Are you doing ip forwarding at all? If so use:
net.inet.ip.fastforwarding=1

It was already in my sysctl.conf

--
 Oleksandr Samoylyk
 OVS-RIPE
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