[ 1428.862660][T12512] netdevsim netdevsim421 eni421np1: renamed from eth0
[ 1428.968631][T12513] netdevsim netdevsim530 eni530np1: renamed from eth1
[ 1432.637314][T12506] Could not find device with ifindex 2000 in netnsfd 11
[ 1432.638580][T12506] Could not find netns with fd: 2000
[ 1432.639641][T12506] Cannot link a netdevsim to itself
[ 1432.641063][T12506] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).