[  521.313769] netdevsim netdevsim456 eni456np1: renamed from eth0
[  521.411851] netdevsim netdevsim729 eni729np1: renamed from eth1
[  521.628306] Could not find device with ifindex 2000 in netnsfd 11
[  521.628507] Could not find netns with fd: 2000
[  521.628597] Cannot link a netdevsim to itself
[  521.628723] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).