[Xen-users] How to get internet work in guest OS?

["ashutosh mehra" <mehra.ashutosh@xxxxxxxxx>]

I have installed xen-3.1.0. Host OS is Ubuntu(feisty) distribution. Over it, I installed Ubuntu(edgy) as guest OS. Problem is that I am not able to access internet from guest OS although from host it is accessible. 

My configuration file for guest OS is:
kernel = "/boot/vmlinuz-2.6.18-xen"
ramdisk = "/boot/initrd.img-2.6.18-xen"
memory = 128
name = "baseimage"
vif = ['bridge=xenbr0']
disk = ['file:/xen-images/guest_base.img,hda1,w','file:/xen-images/guest_base-swap.img,hda2,w']
ip = "192.168.12.101"
netmask = "
255.255.0.0"
gateway = "192.168.12.18"
hostname = "baseimage"
root = "/dev/hda1 ro"
extra = "4"


These are the contents of /etc/network/interfaces file in guest OS:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
        address 192.168.12.101
        netmask 255.255.0.0
        broadcast 
192.168.255.255
        gateway 192.168.3.254
        dns-nameservers 192.168.3.254

Host OS has one interface eth0 having following configuration:
address 192.168.12.18
netmask 255.255.0.0
gateway 192.168.3.254


I wanted to know whether host OS is going to act as gateway for guest OS or the guest OS is also going to use same gateway as host OS?
Are there any links describing nitty-girtty of the configuration file for guest OS?

Thanks & Regards
Ashutosh





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