[  483.547595] netdevsim netdevsim756 eni756np1: renamed from eth1
[  483.647795] netdevsim netdevsim511 eni511np1: renamed from eth0
[  483.998689] Could not find device with ifindex 2000 in netnsfd 11
[  483.998831] Could not find netns with fd: 2000
[  483.998904] Cannot link a netdevsim to itself
[  483.999000] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).