[  509.241863] netdevsim netdevsim721 eni721np1: renamed from eth1
[  509.339464] netdevsim netdevsim298 eni298np1: renamed from eth0
[  509.525763] Could not find device with ifindex 2000 in netnsfd 11
[  509.525923] Could not find netns with fd: 2000
[  509.525996] Cannot link a netdevsim to itself
[  509.526107] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).