I already run trusty containers on my precise host. I have no issues.
I'm trying to run a vivid container on the same host. The container work, but there is no network. The container doesn't get any IP from DHCP.
Doesn't work better with static ip configuration. Even with static ip configuration, ifconfig doesn't return the configured IP for the eth0 interface (there is no "inet addr" line).
I tried the ubuntu (debootstrap) and ubuntu-cloud template. Same thing for both.