[ 1019.085154][T12680] netdevsim netdevsim622 eni622np1: renamed from eth1 [ 1019.182309][T12729] netdevsim netdevsim389 eni389np1: renamed from eth0 [ 1021.050958][T12724] Could not find device with ifindex 2000 in netnsfd 11 [ 1021.052057][T12724] Could not find netns with fd: 2000 [ 1021.052807][T12724] Cannot link a netdevsim to itself [ 1021.053678][T12724] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).