[  521.452576] netdevsim netdevsim491 eni491np1: renamed from eth0
[  521.549173] netdevsim netdevsim619 eni619np1: renamed from eth1
[  521.776869] Could not find device with ifindex 2000 in netnsfd 11
[  521.777046] Could not find netns with fd: 2000
[  521.777156] Cannot link a netdevsim to itself
[  521.777259] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).