[ 1044.819564][T12753] netdevsim netdevsim629 eni629np1: renamed from eth1 [ 1044.850323][T12754] netdevsim netdevsim506 eni506np1: renamed from eth0 [ 1046.754873][T12746] Could not find device with ifindex 2000 in netnsfd 11 [ 1046.755949][T12746] Could not find netns with fd: 2000 [ 1046.756947][T12746] Cannot link a netdevsim to itself [ 1046.758260][T12746] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).