Open Stack

Hello,

After deploying an instance with private and public network, eth0 
receives DHCP offer with private IP but eth1 doesn't receive DHCP offer 
with public IP. However, if I run an VNC console to the instance and, 
then, execute "sudo /sbin/cirros-dhcpd eth1 up", eth1 receives public IP 
(the same IP address that network server shows in dashboard).

Why eth1 starts "down"?

Thanks.