[  473.807519] netdevsim netdevsim447 eni447np1: renamed from eth0
[  473.807958] netdevsim netdevsim621 eni621np1: renamed from eth1
[  473.884144] Could not find device with ifindex 2000 in netnsfd 11
[  473.884233] Could not find netns with fd: 2000
[  473.884277] Cannot link a netdevsim to itself
[  473.884327] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).