[ 1231.439878][T11134] netdevsim netdevsim642 eni642np1: renamed from eth1 [ 1231.532694][T11137] netdevsim netdevsim343 eni343np1: renamed from eth0 [ 1234.968137][T11129] Could not find device with ifindex 2000 in netnsfd 11 [ 1234.968994][T11129] Could not find netns with fd: 2000 [ 1234.969674][T11129] Cannot link a netdevsim to itself [ 1234.970425][T11129] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).