[  473.349765] netdevsim netdevsim421 eni421np1: renamed from eth0
[  473.350003] netdevsim netdevsim624 eni624np1: renamed from eth1
[  473.428047] Could not find device with ifindex 2000 in netnsfd 11
[  473.428176] Could not find netns with fd: 2000
[  473.428279] Cannot link a netdevsim to itself
[  473.428394] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).