[  525.340568] netdevsim netdevsim756 eni756np1: renamed from eth1
[  525.437091] netdevsim netdevsim301 eni301np1: renamed from eth0
[  525.692059] Could not find device with ifindex 2000 in netnsfd 11
[  525.692276] Could not find netns with fd: 2000
[  525.692369] Cannot link a netdevsim to itself
[  525.692473] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).