[ 1244.050340][T11142] netdevsim netdevsim283 eni283np1: renamed from eth0 [ 1244.074282][T11144] netdevsim netdevsim645 eni645np1: renamed from eth1 [ 1247.487045][T11134] Could not find device with ifindex 2000 in netnsfd 11 [ 1247.487797][T11134] Could not find netns with fd: 2000 [ 1247.488592][T11134] Cannot link a netdevsim to itself [ 1247.489297][T11134] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).