[  523.061749] netdevsim netdevsim545 eni545np1: renamed from eth1
[  523.159302] netdevsim netdevsim437 eni437np1: renamed from eth0
[  523.379331] Could not find device with ifindex 2000 in netnsfd 11
[  523.379512] Could not find netns with fd: 2000
[  523.379606] Cannot link a netdevsim to itself
[  523.379711] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).