[  489.387061] netdevsim netdevsim508 eni508np1: renamed from eth0
[  489.488288] netdevsim netdevsim720 eni720np1: renamed from eth1
[  489.842797] Could not find device with ifindex 2000 in netnsfd 11
[  489.842946] Could not find netns with fd: 2000
[  489.843013] Cannot link a netdevsim to itself
[  489.843093] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).