[  516.385779] netdevsim netdevsim501 eni501np1: renamed from eth0
[  516.483556] netdevsim netdevsim637 eni637np1: renamed from eth1
[  516.718244] Could not find device with ifindex 2000 in netnsfd 11
[  516.718459] Could not find netns with fd: 2000
[  516.718557] Cannot link a netdevsim to itself
[  516.718688] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).