[  456.913765] netdevsim netdevsim470 eni470np1: renamed from eth0
[  456.914501] netdevsim netdevsim720 eni720np1: renamed from eth1
[  457.016101] Could not find device with ifindex 2000 in netnsfd 11
[  457.016263] Could not find netns with fd: 2000
[  457.016389] Cannot link a netdevsim to itself
[  457.016501] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).