[  473.423820] netdevsim netdevsim321 eni321np1: renamed from eth0
[  473.424073] netdevsim netdevsim570 eni570np1: renamed from eth1
[  473.501102] Could not find device with ifindex 2000 in netnsfd 11
[  473.501181] Could not find netns with fd: 2000
[  473.501223] Cannot link a netdevsim to itself
[  473.501269] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).