[  610.633888][ T8102] Could not find device with ifindex 2000 in netnsfd 11
[  610.634603][ T8102] Could not find netns with fd: 2000
[  610.635150][ T8102] netdevsim netdevsim353 eth0: Cannot link a netdevsim to itself
[  610.635892][ T8102] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).