[  479.307236] netdevsim netdevsim307 eni307np1: renamed from eth0
[  479.307926] netdevsim netdevsim521 eni521np1: renamed from eth1
[  479.393209] Could not find device with ifindex 2000 in netnsfd 11
[  479.393312] Could not find netns with fd: 2000
[  479.393358] Cannot link a netdevsim to itself
[  479.393416] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).