[ 1222.936977][T11134] netdevsim netdevsim693 eni693np1: renamed from eth1 [ 1223.060035][T11136] netdevsim netdevsim266 eni266np1: renamed from eth0 [ 1226.331123][T11128] Could not find device with ifindex 2000 in netnsfd 11 [ 1226.331787][T11128] Could not find netns with fd: 2000 [ 1226.332296][T11128] Cannot link a netdevsim to itself [ 1226.332979][T11128] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).