[  493.860477] netdevsim netdevsim423 eni423np1: renamed from eth0
[  493.956380] netdevsim netdevsim642 eni642np1: renamed from eth1
[  494.180063] Could not find device with ifindex 2000 in netnsfd 11
[  494.180384] Could not find netns with fd: 2000
[  494.180494] Cannot link a netdevsim to itself
[  494.180611] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).