[  521.452604] netdevsim netdevsim531 eni531np1: renamed from eth1
[  521.551456] netdevsim netdevsim412 eni412np1: renamed from eth0
[  521.779560] Could not find device with ifindex 2000 in netnsfd 11
[  521.779782] Could not find netns with fd: 2000
[  521.779878] Cannot link a netdevsim to itself
[  521.780014] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).