[ 1194.205995][T10982] Could not find device with ifindex 2000 in netnsfd 11
[ 1194.206640][T10982] Could not find netns with fd: 2000
[ 1194.207168][T10982] Cannot link a netdevsim to itself
[ 1194.207836][T10982] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).