[ 1296.259191][T11143] netdevsim netdevsim360 eni360np1: renamed from eth0 [ 1296.351016][T11141] netdevsim netdevsim644 eni644np1: renamed from eth1 [ 1299.936007][T11135] Could not find device with ifindex 2000 in netnsfd 11 [ 1299.937215][T11135] Could not find netns with fd: 2000 [ 1299.938916][T11135] Cannot link a netdevsim to itself [ 1299.940093][T11135] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).