[Bug 226289] [igb] [netmap] Kernel NIC Driver conflict

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226289

--- Comment #7 from wings1446 at gmail.com ---

A partial copy from my FreeBSD support forum post:  
https://forums.freebsd.org/threads/intel-ethernet-adapter-with-intel-82580-controller.67988/

I'm currently using pfSense 2.4.4 with FreeBSD 11.2-RELEASE-p3. I'm using an
Intel E1G44HT I340-T4 4 port PCIe Ethernet Server Adapter that's supposed to
have an Intel 82580 controller (from Intel's documentation:
https://ark.intel.com/products/49186/Intel-Ethernet-Server-Adapter-I340-T4).
The following URL shows that that the igb(4) driver is supposed to be
compatible with the ethernet adapter I listed with the 82580 controller:
https://www.freebsd.org/cgi/man.cgi?igb(4) . I'm using Suricata with pfSense
for an IDPS in Inline IPS mode. I'm receiving netmap_grab_packets messages
which I'm told means that only certain ethernet drivers work with netmap and
has nothing to do with Suricata.

Here is a post from pfSense outlining the same that's pretty detaled:
https://forum.netgate.com/topic/110562/suricata-causing-kernel-error-netmap_grab_packets-bad-pkt-at/2

I hope this information helps.

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