[  521.158734] netdevsim netdevsim656 eni656np1: renamed from eth1
[  521.256782] netdevsim netdevsim390 eni390np1: renamed from eth0
[  521.475005] Could not find device with ifindex 2000 in netnsfd 11
[  521.475171] Could not find netns with fd: 2000
[  521.475279] Cannot link a netdevsim to itself
[  521.475411] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).