The oce driver need line oce_load="YES" in /boot/loader.conf but man page https://www.freebsd.org/cgi/man.cgi?query=oce&sektion=4&manpath=FreeBSD+10.1-RELEASE have state if_oce_load="YES" which is not working. Please change if_oce_load="YES" to oce_load="YES"
This is probably a bug in the oce(4) driver rather than the manpage. Network interface drivers are supposed to use an if_ prefix for their module name. ifconfig(8) has logic that hardcodes this (it will autoload 'if_<foo>.ko' to create a foo0 interface if the interface doesn't exist).
Please try changing the KMOD line in sys/modules/oce/Makefile from 'oce' to 'if_oce'. I think that is all that is required.
I'm using default modules, no compilation on my side. For me, the 10.1 RELEASE is either including wrong man page or the prepared oce driver is not compiled properly or ...? Please take my report as giving you something back. I leave up to you, what will fixed. Maybe line in erradata.txt can help someone with same trouble?
A commit references this bug: Author: jhb Date: Fri Apr 24 14:47:54 UTC 2015 New revision: 281932 URL: https://svnweb.freebsd.org/changeset/base/281932 Log: Rename the kld for oce(4) to if_oce.ko. ifconfig(8) has special knowledge about kld filenames for network drivers that requires them to follow the pattern of if_<foo>. This also fixes the existing documentation in the manpage which says to use if_oce_load=YES in loader.conf. PR: 199095 MFC after: 1 week Changes: head/sys/modules/oce/Makefile
A commit references this bug: Author: jhb Date: Fri Jun 5 20:38:23 UTC 2015 New revision: 284045 URL: https://svnweb.freebsd.org/changeset/base/284045 Log: MFC 281932: Rename the kld for oce(4) to if_oce.ko. ifconfig(8) has special knowledge about kld filenames for network drivers that requires them to follow the pattern of if_<foo>. This also fixes the existing documentation in the manpage which says to use if_oce_load=YES in loader.conf. PR: 199095 Changes: _U stable/10/ stable/10/sys/modules/oce/Makefile _U stable/9/sys/ _U stable/9/sys/modules/ stable/9/sys/modules/oce/Makefile