'adb logcat' is a tool that monitors many kind of events on Android. Both ip commands prints a SElinux record on logcat:
Upon the successfull 'ip link' command, logcat prints:
12-06 09:17:24.119 2460 2460 W ip : type=1400 audit(0.0:8): avc: denied { search } for name="net" dev="vdc" ino=91 scontext=u:r:shell:s0 tcontext=u:object_r:net_data_file:s0 tclass=dir permissive=0
Upon the failed 'ip link' command, logcat prints:
12-06 09:17:42.109 2461 2461 W ip : type=1400 audit(0.0:9): avc: denied { nlmsg_write } for scontext=u:r:shell:s0 tcontext=u:r:shell:s0 tclass=netlink_route_socket permissive=0