[ 1251.007114][T11132] netdevsim netdevsim483 eni483np1: renamed from eth0 [ 1251.106958][T11131] netdevsim netdevsim574 eni574np1: renamed from eth1 [ 1254.442133][T11124] Could not find device with ifindex 2000 in netnsfd 11 [ 1254.442912][T11124] Could not find netns with fd: 2000 [ 1254.443508][T11124] Cannot link a netdevsim to itself [ 1254.444166][T11124] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).