[  488.782406] netdevsim netdevsim507 eni507np1: renamed from eth0
[  488.783891] netdevsim netdevsim642 eni642np1: renamed from eth1
[  488.872820] Could not find device with ifindex 2000 in netnsfd 11
[  488.872908] Could not find netns with fd: 2000
[  488.872954] Cannot link a netdevsim to itself
[  488.873004] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).