[  490.422703] netdevsim netdevsim639 eni639np1: renamed from eth1
[  490.518491] netdevsim netdevsim391 eni391np1: renamed from eth0
[  490.746921] Could not find device with ifindex 2000 in netnsfd 11
[  490.747202] Could not find netns with fd: 2000
[  490.747319] Cannot link a netdevsim to itself
[  490.747474] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).