eth1 over OpenVZ for backups

Hi,
I have few nodes with eth0 as main IP with Internet IP and eth1 with Internal IP (192.168.xxx.xxx)
on each node we have few OpenVZ VMs
and we have another Backup device that work with eth for internal network and eth for Internet IP
we wont to do the OpenVZ VMs backups via the internal network.
now, even the eth1 is configured, any connection include 192.168.xxx.xxx Goes through eth0 (Internet IP)
I'd be happy to help detailed how to make to
192.168.xxx.xxx go into eth1

Best Regards,
Star Network.