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====== FreeNAS - NIC not recognized ======

<code bash>
ifconfig
</code>

Only showing **re0**.

----

===== Check the output of dmesg =====

<code bash>
dmesg | grep net
</code>


----

===== Check if Kernel Drivers are loaded =====

<code bash>
kldstat
</code>

returns:

<code bash>
Id Refs Address            Size     Name
 1   75 0xffffffff80200000 2566f28  kernel
 2    1 0xffffffff82768000 100ee8   ispfw.ko
 3    1 0xffffffff82869000 fa60     ipmi.ko
 4    2 0xffffffff82879000 2d70     smbus.ko
 5    1 0xffffffff8287c000 32cc8    if_bnxt.ko
 6    1 0xffffffff828af000 2243e8   if_qlxgbe.ko
 7    1 0xffffffff82ad4000 f1440    ocs_fc.ko
 8    1 0xffffffff82bc6000 22150    smartpqi.ko
 9    1 0xffffffff82be9000 8a40     freenas_sysctl.ko
10    1 0xffffffff82e19000 330048   vmm.ko
11    1 0xffffffff8314a000 a84      nmdm.ko
12    1 0xffffffff8314b000 2ec      dtraceall.ko
13    9 0xffffffff8314c000 39a78    dtrace.ko
14    1 0xffffffff83186000 5c0      dtmalloc.ko
15    1 0xffffffff83187000 1898     dtnfscl.ko
16    1 0xffffffff83189000 1d61     fbt.ko
17    1 0xffffffff8318b000 53240    fasttrap.ko
18    1 0xffffffff831df000 bcc      sdt.ko
19    1 0xffffffff831e0000 6af0     systrace.ko
20    1 0xffffffff831e7000 6ac8     systrace_freebsd32.ko
21    1 0xffffffff831ee000 f9c      profile.ko
22    1 0xffffffff831ef000 39f4     geom_multipath.ko
23    1 0xffffffff831f3000 14320    hwpmc.ko
24    1 0xffffffff83208000 7140     t3_tom.ko
25    2 0xffffffff83210000 aa8      toecore.ko
26    1 0xffffffff83211000 f8d0     t4_tom.ko
</code>

It could be that the network driver that is needed is not loaded.

<WRAP info>
**NOTE:**  Some drivers, such as **if_igb** is nowadays compiled into the kernel, so not needed as a module, so this will not appear in the list.

So even if the driver is not seen, this does not necessarily mean this is the problem.
</WRAP>


----

===== Load Drivers =====

Try the following drivers:

  * igp
  * em

----

===== Try load em driver =====

Load the **em** driver as a module at boot time by placing the following line in **/boot/loader.conf**.

<file bash>
if_em_load="YES"
</file>

<WRAP info>
**NOTE:**  There are other tunables too.

See https://www.freebsd.org/cgi/man.cgi?query=em&sektion=4
</WRAP>


Then reboot and see if that makes a difference.

----

===== Try load intel igp driver =====

It may be that the **igp** driver is not loaded.

The **igb** driver supports Gigabit Ethernet adapters based on the Intel 82575 and 82576 controller chips:

  * Intel Gigabit ET Dual Port Server Adapter (82576)
  * Intel Gigabit VT Quad Port Server Adapter (82575)
  * Intel Single, Dual and Quad Gigabit Ethernet Controller (82580)
  * Intel i210 and i211 Gigabit Ethernet Controller
  * Intel i350 and i354 Gigabit Ethernet Controller 

<WRAP important>
**WARNING:**  The **igb** driver is often complied into the FreeNAS kernel so these next steps might not work.

If this does not work then just comment out the loading of the "igp" driver within **/boot/loader.conf** file.

</WRAP>


Place the following line in **/boot/loader.conf**:

<file bash /boot/loader.conf>
if_igb_load="YES" 
</file>

<WRAP info>
**NOTE:**  There are other tunables too.

See https://www.freebsd.org/cgi/man.cgi?igb(4)
</WRAP>

<WRAP info>
**NOTE:**  You might need to reboot to be certain the driver is loaded.

You could also try to load it manually:

<code bash>
kldload if_igb
</code>

Check if the driver is loaded

<code bash>
kldstat
</code>

returns:

<code bash>
root@freenas2:/ # kldstat
Id Refs Address            Size     Name
 1   75 0xffffffff80200000 2566f28  kernel
 2    1 0xffffffff82768000 100ee8   ispfw.ko
 3    1 0xffffffff82869000 fa60     ipmi.ko
 4    2 0xffffffff82879000 2d70     smbus.ko
 5    1 0xffffffff8287c000 32cc8    if_bnxt.ko
 6    1 0xffffffff828af000 2243e8   if_qlxgbe.ko
 7    1 0xffffffff82ad4000 f1440    ocs_fc.ko
 8    1 0xffffffff82bc6000 22150    smartpqi.ko
 9    1 0xffffffff82be9000 8a40     freenas_sysctl.ko
10    1 0xffffffff82e19000 330048   vmm.ko
11    1 0xffffffff8314a000 a84      nmdm.ko
12    1 0xffffffff8314b000 2ec      dtraceall.ko
13    9 0xffffffff8314c000 39a78    dtrace.ko
14    1 0xffffffff83186000 5c0      dtmalloc.ko
15    1 0xffffffff83187000 1898     dtnfscl.ko
16    1 0xffffffff83189000 1d61     fbt.ko
17    1 0xffffffff8318b000 53240    fasttrap.ko
18    1 0xffffffff831df000 bcc      sdt.ko
19    1 0xffffffff831e0000 6af0     systrace.ko
20    1 0xffffffff831e7000 6ac8     systrace_freebsd32.ko
21    1 0xffffffff831ee000 f9c      profile.ko
22    1 0xffffffff831ef000 39f4     geom_multipath.ko
23    1 0xffffffff831f3000 14320    hwpmc.ko
24    1 0xffffffff83208000 7140     t3_tom.ko
25    2 0xffffffff83210000 aa8      toecore.ko
26    1 0xffffffff83211000 f8d0     t4_tom.ko
</code>

kldstat reports that **if_igb** isn't loaded, so it must be compiled in.


</WRAP>


----

===== References =====

https://www.freebsd.org/cgi/man.cgi?igb(4)

https://www.freebsd.org/cgi/man.cgi?query=em&sektion=4