[  821.146091][T14770] netdevsim netdevsim421 eni421np1: renamed from eth0
[  821.171126][T14772] netdevsim netdevsim540 eni540np1: renamed from eth1
[  821.800694][T14758] Could not find device with ifindex 2000 in netnsfd 11
[  821.801629][T14758] Could not find netns with fd: 2000
[  821.802112][T14758] Cannot link a netdevsim to itself
[  821.802683][T14758] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).