[ 1033.641918][T12654] netdevsim netdevsim494 eni494np1: renamed from eth0 [ 1033.711303][T12636] netdevsim netdevsim679 eni679np1: renamed from eth1 [ 1035.706949][T12731] Could not find device with ifindex 2000 in netnsfd 11 [ 1035.707885][T12731] Could not find netns with fd: 2000 [ 1035.708604][T12731] Cannot link a netdevsim to itself [ 1035.715365][T12731] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).