[  520.037906] netdevsim netdevsim409 eni409np1: renamed from eth0
[  520.134669] netdevsim netdevsim673 eni673np1: renamed from eth1
[  520.347142] Could not find device with ifindex 2000 in netnsfd 11
[  520.347302] Could not find netns with fd: 2000
[  520.347372] Cannot link a netdevsim to itself
[  520.347500] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).