[  457.398724] netdevsim netdevsim509 eni509np1: renamed from eth0
[  457.399549] netdevsim netdevsim750 eni750np1: renamed from eth1
[  457.510872] Could not find device with ifindex 2000 in netnsfd 11
[  457.510976] Could not find netns with fd: 2000
[  457.511025] Cannot link a netdevsim to itself
[  457.511081] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).