[  614.329654][ T8097] Could not find device with ifindex 2000 in netnsfd 11
[  614.330426][ T8097] Could not find netns with fd: 2000
[  614.331155][ T8097] netdevsim netdevsim350 eth0: Cannot link a netdevsim to itself
[  614.331900][ T8097] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).