[  456.938751] netdevsim netdevsim456 eni456np1: renamed from eth0
[  456.941762] netdevsim netdevsim728 eni728np1: renamed from eth1
[  457.028784] Could not find device with ifindex 2000 in netnsfd 11
[  457.028894] Could not find netns with fd: 2000
[  457.028940] Cannot link a netdevsim to itself
[  457.028991] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).