[  456.714584] netdevsim netdevsim450 eni450np1: renamed from eth0
[  456.719383] netdevsim netdevsim612 eni612np1: renamed from eth1
[  456.811714] Could not find device with ifindex 2000 in netnsfd 11
[  456.811820] Could not find netns with fd: 2000
[  456.811866] Cannot link a netdevsim to itself
[  456.811924] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).