[ 1030.658825][T12584] netdevsim netdevsim494 eni494np1: renamed from eth0 [ 1030.695059][T12585] netdevsim netdevsim766 eni766np1: renamed from eth1 [ 1032.477581][T12576] Could not find device with ifindex 2000 in netnsfd 11 [ 1032.478637][T12576] Could not find netns with fd: 2000 [ 1032.479350][T12576] Cannot link a netdevsim to itself [ 1032.480190][T12576] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).