[  517.941505] netdevsim netdevsim699 eni699np1: renamed from eth1
[  518.038435] netdevsim netdevsim399 eni399np1: renamed from eth0
[  518.318852] Could not find device with ifindex 2000 in netnsfd 11
[  518.319102] Could not find netns with fd: 2000
[  518.319217] Cannot link a netdevsim to itself
[  518.319358] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).