James Kilton wrote:
Hello,

We've installed some FreeBSD machines as Gigabit sniffers, and I'm
wondering if there are any things I can tweak (e.g., buffer size) to help
TCPDUMP capture better (we often see packets dropped by the kernel).

Any advice would be appreciated.

Thanks,
James

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Enable device polling.

Add the following options to your kernel config, and then compile and install the new kernel:
options DEVICE_POLLING
options HZ=1000


After reboot, enable polling mode on with:
        sysctl kern.polling.enable=1

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