[ 1224.989843][T11145] netdevsim netdevsim492 eni492np1: renamed from eth0 [ 1225.103887][T11144] netdevsim netdevsim594 eni594np1: renamed from eth1 [ 1228.328373][T11137] Could not find device with ifindex 2000 in netnsfd 11 [ 1228.329564][T11137] Could not find netns with fd: 2000 [ 1228.330476][T11137] Cannot link a netdevsim to itself [ 1228.331584][T11137] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).