[ 485.756982] netdevsim netdevsim475 eni475np1: renamed from eth0 [ 485.857859] netdevsim netdevsim668 eni668np1: renamed from eth1 [ 486.219070] Could not find device with ifindex 2000 in netnsfd 11 [ 486.219224] Could not find netns with fd: 2000 [ 486.219309] Cannot link a netdevsim to itself [ 486.219425] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).