[  477.503336] netdevsim netdevsim503 eni503np1: renamed from eth0
[  477.503629] netdevsim netdevsim637 eni637np1: renamed from eth1
[  477.602303] Could not find device with ifindex 2000 in netnsfd 11
[  477.602391] Could not find netns with fd: 2000
[  477.602434] Cannot link a netdevsim to itself
[  477.602485] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).