[  488.350603] netdevsim netdevsim450 eni450np1: renamed from eth0
[  488.351233] netdevsim netdevsim618 eni618np1: renamed from eth1
[  488.445546] Could not find device with ifindex 2000 in netnsfd 11
[  488.445676] Could not find netns with fd: 2000
[  488.445725] Cannot link a netdevsim to itself
[  488.445777] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).