[  495.419557] netdevsim netdevsim456 eni456np1: renamed from eth0
[  495.517047] netdevsim netdevsim723 eni723np1: renamed from eth1
[  495.732763] Could not find device with ifindex 2000 in netnsfd 11
[  495.732997] Could not find netns with fd: 2000
[  495.733077] Cannot link a netdevsim to itself
[  495.733212] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).