[  475.821128] netdevsim netdevsim421 eni421np1: renamed from eth0
[  475.821288] netdevsim netdevsim544 eni544np1: renamed from eth1
[  475.912179] Could not find device with ifindex 2000 in netnsfd 11
[  475.912266] Could not find netns with fd: 2000
[  475.912310] Cannot link a netdevsim to itself
[  475.912363] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).