[ 1011.925938][T12641] netdevsim netdevsim374 eni374np1: renamed from eth0 [ 1012.037574][T12643] netdevsim netdevsim612 eni612np1: renamed from eth1 [ 1013.835690][T12721] Could not find device with ifindex 2000 in netnsfd 11 [ 1013.836752][T12721] Could not find netns with fd: 2000 [ 1013.837493][T12721] Cannot link a netdevsim to itself [ 1013.838300][T12721] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).