Have you extend the 10... network VLAN son your switch to the same ports as the 192.... network? Does your switch require VLAN tagging and do you have it setup VLANS defined on your network interfaces in question?
I don't see anything wrong in your configure. I assume you can ping your 10.244.69.35 but not anything else.
I am new to Oracle VM. The dom0 and domU are set up by someone else. So I don't know the details. In the domU, I can't even ping the 10.244.69.35 address of the dom0.
# ping 10.244.69.35
PING 10.244.69.35 (10.244.69.35) 56(84) bytes of data.
From 192.168.200.50 icmp_seq=2 Destination Host Unreachable
From 192.168.200.50 icmp_seq=3 Destination Host Unreachable
From 192.168.200.50 icmp_seq=4 Destination Host Unreachable
The Cisco switch on the 10.*.*.* network is owned by IT and I can't change anything on it. This is why I try to set up NAT on the dom0. I would appreciate any help so that I can access the 10.*.*.* network from the domU.