[ 1008.622553][T12128] netdevsim netdevsim621 eni621np1: renamed from eth1
[ 1008.630885][T12127] netdevsim netdevsim421 eni421np1: renamed from eth0
[ 1010.341228][T12553] Could not find device with ifindex 2000 in netnsfd 11
[ 1010.342104][T12553] Could not find netns with fd: 2000
[ 1010.342722][T12553] Cannot link a netdevsim to itself
[ 1010.343687][T12553] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).