[  521.496068] netdevsim netdevsim541 eni541np1: renamed from eth1
[  521.592200] netdevsim netdevsim291 eni291np1: renamed from eth0
[  521.851557] Could not find device with ifindex 2000 in netnsfd 11
[  521.851830] Could not find netns with fd: 2000
[  521.851960] Cannot link a netdevsim to itself
[  521.852110] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).