[  455.006693] netdevsim netdevsim521 eni521np1: renamed from eth1
[  455.006859] netdevsim netdevsim379 eni379np1: renamed from eth0
[  455.097037] Could not find device with ifindex 2000 in netnsfd 11
[  455.097136] Could not find netns with fd: 2000
[  455.097180] Cannot link a netdevsim to itself
[  455.097230] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).