[  520.890071] netdevsim netdevsim303 eni303np1: renamed from eth0
[  520.987621] netdevsim netdevsim535 eni535np1: renamed from eth1
[  521.195474] Could not find device with ifindex 2000 in netnsfd 11
[  521.195619] Could not find netns with fd: 2000
[  521.195691] Cannot link a netdevsim to itself
[  521.195777] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).