[ 1227.782417][T11142] netdevsim netdevsim380 eni380np1: renamed from eth0 [ 1227.797781][T11141] netdevsim netdevsim628 eni628np1: renamed from eth1 [ 1231.107149][T11133] Could not find device with ifindex 2000 in netnsfd 11 [ 1231.107865][T11133] Could not find netns with fd: 2000 [ 1231.108424][T11133] Cannot link a netdevsim to itself [ 1231.109359][T11133] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).