[ 1236.413951][T12786] netdevsim netdevsim721 eni721np1: renamed from eth1
[ 1236.495044][T12789] netdevsim netdevsim504 eni504np1: renamed from eth0
[ 1239.019084][T12781] Could not find device with ifindex 2000 in netnsfd 11
[ 1239.020307][T12781] Could not find netns with fd: 2000
[ 1239.021205][T12781] Cannot link a netdevsim to itself
[ 1239.022314][T12781] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).