[ 1028.615050][T12131] netdevsim netdevsim478 eni478np1: renamed from eth0 [ 1028.731049][T12065] netdevsim netdevsim741 eni741np1: renamed from eth1 [ 1030.604001][T12551] Could not find device with ifindex 2000 in netnsfd 11 [ 1030.605135][T12551] Could not find netns with fd: 2000 [ 1030.605869][T12551] Cannot link a netdevsim to itself [ 1030.606894][T12551] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).