sudo lxc-create -t download -n test
Error creating container test

sudo lxc-create -t download -n test -o aaa.log
lxc-create: test: confile.c: set_config_net: 258 lxc.net must not have a value
lxc-create: test: parse.c: lxc_file_for_each_line_mmap: 103 Failed to parse config: lxc.network.type = veth

vi /etc/lxc/default.conf
#lxc.network.type = veth
lxc.net.0.type = vet

#lxc.network.link = virbr0
lxc.net.0.link = virbr0

lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx