[ 480.241600] netdevsim netdevsim276 eni276np1: renamed from eth0 [ 480.342953] netdevsim netdevsim527 eni527np1: renamed from eth1 [ 480.714045] Could not find device with ifindex 2000 in netnsfd 11 [ 480.714197] Could not find netns with fd: 2000 [ 480.714284] Cannot link a netdevsim to itself [ 480.714387] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).