[ 1270.232874][T12848] netdevsim netdevsim721 eni721np1: renamed from eth1
[ 1270.352591][T12849] netdevsim netdevsim451 eni451np1: renamed from eth0
[ 1272.826494][T12837] Could not find device with ifindex 2000 in netnsfd 11
[ 1272.828844][T12837] Could not find netns with fd: 2000
[ 1272.829821][T12837] Cannot link a netdevsim to itself
[ 1272.831487][T12837] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).