When you give a VM a Bridged Adapter, it's effectively like giving it its own NIC connected directly to your network.
The Ubuntu installation inside of the VM needs to be set to use a static IP address. This is done in the /etc/network/interfaces
file. Some information about the interfaces
file can be found on this page: https://help.ubuntu.com/12.04/serverguide/network-configuration.html
Here is an example interfaces
file configured to match your question:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 192.168.10.99
netmask 255.255.255.0
broadcast 192.168.10.255
network 192.168.10.0
gateway 192.168.10.1
After making modifications to /etc/network/interfaces
, restart your VM for the changes to take effect.