Changes
Clarified when the veth devices are automatically created.
/usr/sbin/vzctl set 100 --netif_add eth1 --save
The above creates corresponding veth100.0 and veth100.1 devices on the host and updates the host /etc/vz/conf/100.conf file with generated MAC addresses for the veth devices. When the VE is started, the veth100.0 and veth100.1 devices will be automatically created on the host.
==Bridge the host and VE==